Takeo Gouda is a first-year high school student. Clocking in at 2 meters and 120 kilos, Takeo is a socially awkward hothead who's straight as an arrow. One day, he saves a high school girl from a groper on a train, and falls in love with her the next day when she comes by to thank him. But he believes that she must have fallen instead for his best friend with model-like good looks.

Takeo and Rinko are now text pals. Takeo's heart skips a beat every time he gets a girly text from Rinko, but he believes Rinko has fallen for Suna and vows to make her dream come true.

Takeo and Rinko finally meet alone. Although Takeo had thought that Rinko just wanted some relationship advice for approaching Makoto, Takeo is taken aback when Rinko starts crying.

Rinko's crush wasn't Makoto, but Takeo! Elated by having a girlfriend for the very first time, Takeo's heart is about to burst from happiness. But Takeo's true mettle is about to be tested when a major accident occurs during a singles meetup between his and Rinko's friends...

Rinko's birthday is fast approaching, and Takeo plans out their birthday date with Suna's help. Sensing something amiss with Suna, Rinko suggests inviting Suna to their date, but Suna says that he has something he needs to do that day...

Rinko's birthday is the same day Suna's father is scheduled to undergo surgery. Takeo tries to honor Suna's wishes by following through with his and Yamato's birthday date, but Takeo can't stop thinking about Suna's plight. After much thought, Takeo decides to tell Rinko.

When Rinko makes an offhand comment that she'd like the two of them to go to the same university, it motivates Takeo to study like his life depends on it. But Rinko's first choice school is Murasakifuji, a top university. Takeo crams in preparation for a benchmark exam to figure out his chances for getting in, but will he make the cut?

Mariya Saijou, a classmate of Takeo's, would not count running as one of her favorite activities, but she ends up being assigned to a relay at the school festival along with Takeo. He tries to help her improve through practice. Mariya, who barely knows Takeo, gradually comes to realize his rare qualities...

Mariya Saijou tells Takeo that she likes him "as a person" after falling for Takeo, knowing full well that he already has a girlfriend. Being dense, Takeo takes her words literally, but what will he do once he finds out how she really feels?

Takeo's mother's due date is approaching, but she continues to engage in household chores with dangerous enthusiasm. She ridicules Takeo for being anxious for her well-being, but an unexpected incident causes her to evaluate her son.

Every year, Suna has received an anonymous letter and chocolate on Valentine's Day. Every time, the letter says, "I don't need anything in return, but please like me." One day, Takeo senses a strange presence behind them, and meets the sender of the letter, Yukika Amami. After hearing about her longtime feelings for Suna, Takeo decides to help her!

True love.