Fist-Sized Heart) is an Indian Telugu-language romantic drama television series which aired on Star Maa from 7 December 2020 till 31 August 2024, at 7 p.m. IST from Monday to Saturday.

The main plot of the serial was taken from Bengali language series Mohor, which aired on Star Jalsha.

He is rich, arrogant, hot-tempered, and is hostile towards his mother, Jagathi, due to a misunderstanding that she left him in his childhood because she didn't want him in her life and chose her career over him.

An extremely talented and intelligent student, Rishi becomes a university gold medalist, and starts managing the DBST college.

Rishi's paths cross with Vasudhara 'Vasu', a headstrong and brilliant student from a village who dreams to become a teacher.

Jagathi, who is Vasu's former teacher in her village, advises her to run away from home and study at her son Rishi's college, DBST.

Rishi also saves her multiple times from the lustful conspiracies of Rajiv, who is later jailed by SI Sireesh, Vasu's childhood friend.

Jagathi proposes a project called 'Mission Education', which Rishi reluctantly agrees to lead at DBST, and eventually acquires Government support for it.

Rishi recruits Vasudhara as his project assistant, and they all work together to make Mission Education a grand success.

Finally, desperate, she stands for hours in the rain before Rishi relents and confronts her about marrying Sireesh.

Vasu emotionally reveals that she isn't engaged to Sireesh, and begs Rishi to scold her all he wants, but not punish her by being distant or ignoring her.

Against Devyani's wishes, Rishi reluctantly brings Jagathi to his house for the first time in 22 years to celebrate Makar Sankranti, for Mahindra's happiness after he suffers a heart stroke.

Rishi resolves to stay away from Vasu, while she hallucinates him everywhere and can't concentrate in class or her part-time job.

When Sakshi publicly proposes marriage to a furious Rishi in college, Devyani begs him to marry her for their family's reputation.

Rishi gracefully accepts her proposal on the condition that in his love, she won't neglect her education and career.

When Jagathi meets with a road accident, Rishi saves her life by donating blood to her and takes great care of her.

Rishi lashes out at a scared Vasu for taking major decisions about their lives without telling him, public humiliation by Devyani, Rishi declares Vasu as his wife in front of the media, but firmly warns her in private that she simply wearing a mangalasutra in his name without his knowledge does not make her his wife.

Rishi aspires to advance DBST college to new heights by offering medical degree courses.

Furious and anguished at this character assassination, Rishi resigns and appoints Jagathi as the college MD.

Three Years Later Mahindra, Jagathi and Vasu are pained, lonely and miserable, living distant from each other and desperately hoping to find Rishi.

Rishi is still cold towards a remorseful Vasu for betraying him three years ago, and rejects all attempts made by her and Chakram to gain his forgiveness.

Mahindra and Jagathi are ecstatic to discover Rishi's whereabouts through Chakram, and try to spend time with him by creating collaborations between Vish college and DBST.

Shailendra poisons Jagathi's food, and she passes away after witnessing her son's wedding, shattering Rishi and Mahindra.

The pair of Rishi and Vasudhara, fondly called by fans as 'Rishidhara', is immensely loved and tremendously popular among audiences of all age groups.

In September 2022, Guppedantha Manasu became the top GEC show in Telugu television in both Urban and Rural ratings, breaking the 221-week long first place record of the Star Maa serial, Karthika Deepam.