Yeh Un Dinon Ki Baat Hai

The narration starts the story in Ahmedabad, in the year 1990. Naina Agarwal is a 16-year old girl studying at Pragati Vidya Ka Mandir. She lost her mother at birth, is raised by her Chacha-Chachi, lives in a conservative joint family. Her father Rakesh Agarwal, a librarian at Pragati Vidya Ka Mandir, have an orthodox mindset supporting only his son Arjun's dream and neglecting Naina. But Naina is supported by her uncle Anand and aunt Bela. And in Nainital, Sameer Maheshwari, a 17-year-old, gets suspended from his boarding school on account of mischief. He returns to his maternal grandfather, Jaiprakash Maheshwari, in Ahmedabad. After Sameer's father died, his mother Vishakha had married Vivek Somani and shifted to Delhi. Their relationship has got only bitter with time. In turn of events, Sameer joined his cousin Munna's school, which is also Naina's school, as her classmate; she falls for him at the first sight.

Sameer formed a disliking against Naina when she, as the Head Discipline Monitor of her school, had to testify against him. On the other hand, Naina admires and dreams of her first love, Sameer, all the time. Sameer decides to take part in the Headboy competition to prove himself worthy to his mother. He asks for Naina's help and Naina readily starts teaching him. But Rakesh caught and rebuked her as the opponent against Sameer was her own brother Arjun Agarwal. Sameer again gets angry on Naina as she kept silent in front of her father. Later, Arjun wins the competition whereas Sameer is appreciated by Vishakha for his hardwork and dedication which does not sit well with Vivek Somani. But the situation gets worse when Naina misunderstands and accuses him of stealing the exam papers in front of the Principal. His restrained relationship with his mother is highly affected, along his reputation in school. Thus an enraged Sameer decides to take revenge on both Rakesh and Naina, engaging in a bet with his seniors, where he has to make Naina say "I Love You" and hug him. Sameer and his friends Munna and Pandit start acting on the bet as he keeps trying to woo Naina. Naina gets to know it's Arjun who had stolen the question paper, and she starts responding to his efforts.

After Naina refuses to tie Sameer a Rakhi on Raksha Bandhan, they start pursuing a relationship. Naina's penfriend-turned-neighbour Shefali keeps helping her with situations. Throughout the time, Sameer developed a soft corner for Naina but is totally unaware of it. Naina's best friend Swati, who also has a crush on Sameer, gets to know about their secret relationship and gets upset. But their friendship gets saved with Sameer's efforts. Sameer wishes to make Naina come to the school trip in Mount Abu and finish the bet there. But as they keep getting to know each other better, he starts falling for her and keeps feeling guilty of the bet. By the end of the trip an overwhelmed Sameer tries hard to back off from the bet, but Naina confesses her feelings first and immediately gets to know the truth. She gets heartbroken.

Naina has a hard time dealing with the pain, still decides to move on for her family and herself. On the other hand, Sameer had decided to stay away from her till his friends Munna and Pandit made him realise he had to apologize to her. But at school, Naina pretends like nothing happened and keeps avoiding Sameer's attempts at apology. Sameer falls sick after spending the whole night in front of Naina's house. Naina visits him in the hospital and has a breakdown after telling him why she can't forgive him easily. Sameer finally realizes he is in love with Naina.

Sameer tells his grandfather everything who scolded him for his deeds but promises to help him. Arjun overheard the seniors in the school and gets to know about the bet. His raging confrontation with Sameer results in a scuffle, where Sameer tries to resist him but accidentally pushes him down the stairs, breaking his leg. As a punishment, Sameer is asked to serve Arjun at his home till his recovery. Sameer faced a lot of difficulty in Naina's home. He melts Naina's heart by getting Rakesh in the PTA meeting where she was awarded. After Naina's cousin Pooja's marriage wedding festivities began at home, he accidentally mistaken Preeti (Naina's cousin) as Naina and confesses his love. Preeti first gets angry with Naina for not sharing this ever with her, but after hearing both sides she still supported Sameer. Over the time of the wedding, Sameer managed to win everyone's heart. Naina too finally forgives Sameer after realizing all his efforts. Sameer and Naina

confessed their love to each other after Sameer helped Arjun win a crucial cricket match of his career.

Jaiprakash Maheshwari passed away and Sameer had to shift to Delhi without Naina or any of his friends knowing. There Sameer reconciles with his mother and also bonds with his step-siblings Deepika and Rohan. Meanwhile, Sameer and Naina carried on their long distance relationship by communicating through phones and letters with the former's neighbour Amrita's help. However, the consequences of their relationship leads to Naina failing in exam whereas Sameer as a result of loneliness in Delhi falls into bad company. Shanti, Naina's class teacher finds out about her relationship with Sameer and warns her not to compromise her studies. Naina promises Sameer that she will study hard and top again and eventually does. She managed to send Munna and Pandit to Delhi where they realise of Sameer's bad company and made him realise his mistake. Everything goes on smoothly and Sameer joined a radio station as a programmer where Naina listens to his voice everyday. But due to Mr. Somani's mother's harsh words Sameer starts considering himself as unlucky for his loved ones. He tries to disconnect from Naina through all means, but is sent back to Ahmedabad by his mother after she notices his depression. Meanwhile, Naina celebrates farewell in her school where she feels Sameer's presence.

Anand wanted Naina to take admission in a reputed University but when she realises that Sameer considers himself unlucky for her and that he is joining VJN College, she somehow manages to take admission there and makes Sameer realise that his assumptions about himself are wrong.In the meantime, Swati also gets into relationship with Munna. Their happy days come to a halt when Naina breaks up with Sameer after seeing the consequences of Arjun-Shefali's relationship in her family. Soon her marriage is fixed to an arrogant CA Sharad. Sameer, in order to make Naina jealous, gets in a relationship with their classmate Sunaina which angers Naina and she warns him against this. Soon Sameer and Naina decided to be friends to preserve the happy memories of their love. But destiny plays its game and Naina broke the alliance because of Sharad's violent behavior towards her uncle, Anand. Anand gets to know about Sameer and Naina's relationship and he approved after realising Sameer's true love for Naina. He promised to stand by them during their marriage. Hence, Sameer breaks up with Sunaina who decides for revenge.

Sameer and Naina get back to pursuing their relationship in college. Sunaina challenges Naina to contest for General Secretary elections against her. Naina, Sameer and their friends unknowingly hurt Swati who was a candidate for election and cancels her nomination without asking her. Sunaina takes advantage of this and manipulates a heart broken Swati against Naina. Swati promised to help her. Sameer gets suspicious of Swati's intentions and tries to warn Naina but she refuses to believe. Finally, Naina wins the elections but loses her childhood friend as Swati is exposed in front of them. Meanwhile, Sunaina and her gang leave no stone unturned to insult Naina and Sameer but eventually falls in their own trap.

After some time, they get caught red-handed as a couple and hell breaks loose. Everyone in the family got furious on Naina. Rakesh tried to forcefully marry Naina to Sharad. Since Anand was out of town, it became difficult for Naina to convince her father. Meanwhile, Sameer plans to elope with Naina and hide somewhere until Anand's arrival. He succeeds with his friends help. Swati too joins in helping Naina and Sameer and the gang have a reunion. On the other hand, Anand arrives and misunderstood the situation and gets angry on Naina and Sameer but Bela tells him the truth.

At Sameer's family,Vishakha had already disapproved of Naina for Sameer assuming she's too practical unlike him. But after Sameer's blackmailing, the family had to come forward to agree to their marriage. After an ugly situation in the engagement, Sameer moves out of his house to marry Naina on his own, the Agarwal family too gets broken as Naresh and Beena disapproves of the alliance despite Anand and Bela's constant requests. In the name of Arjun's future, Naresh forces Rajesh to not attend Naina's wedding. But with the help of the friends and the remaining family, the couple finally gets married with everyone's blessings.

Sameer and Naina start living in a separate bungalow Sameer especially bought for her. But reality hits when the differences in their living and mindsets started creating clashes between them. Due to their young age and immaturity, their marriage started on a rocky road since both end up making several mistakes. Sameer's uncle, Kamlesh and his son, Devang kicked him out from the family business too. But after a big fight, Sameer and Naina decide to work on themselves and make their love last despite everything.

Sameer and Naina start their own business, called 'Samaina boutique' which doesn't run very well. But Sameer gets to act in an advertisement, where he realizes his acting potential. They decided to travel to Mumbai for an acting career. They sold their house and left for Mumbai with Rakesh. But it wasn't as easy as they thought it would be. They struggled to settle in the city. Eventually Naina decided to take her passion for writing as a career, and Sameer decided to support his wife with writing. They presented their first story to Aruna Irani. She accepted their story and telecasted their serial which was successful. Soon they are able to buy their rented flat in Mumbai.

Naina gave birth to their daughter, named Suman Maheshwari. After 2 years, Sameer buys back his old bungalow in Ahmedabad for Naina. They returned to Ahmedabad and reconciled with the family members, even those who had turned foes during their marriage. Naina, Sameer, and all their friends reunite at their school's 50th anniversary. They reminiscence their old days. Thus the story concludes happily in 1998.

The opening theme of Yeh Un Dinon Ki Baat Hai is composed by Anu Malik. The lyrics are written by Sanjay Chhel, and it comprises the voices of legendary singers Kumar Sanu and Sadhana Sargam. The song has been praised for its melodious lyrics, which refresh the happenings in the 1990s.[10][11]

It was particularly hailed for its fresh outlook and for bringing out the nostalgia and the flavours of the 90s.[12] It topped Sony TV shows by gaining a TRP of 1.5 in its first week.[4][13]

The Times of India hailed it as one of the best TV shows launched in 2017 and praised the performances of newcomers Ashi Singh and Randeep Rai.[5]

The UK's weekly Asian newspaper Eastern Eye praised the creative team of the show for leaving no stone unturned to recreate the city of Ahmedabad from an earlier era, calling it a tribute to the city.[14]

This show has also earned compliments from various television and film actors.[15]

• List of programs broadcast by Sony Entertainment Television

• Yeh Un Dinon Ki Baat Hai at IMDb
• Yeh Un Dinon Ki Baat Hai on Sony LIV
• Official website on SET India