Mariko is a nurse who loves to eat and has always been plus size since childhood. Mariko is invited to a group date by her senior, and there's a handsome guy who doesn't like fat people...!?

Mariko is invited to a group party by her senior, and she uses her cheerfulness to liven up the occasion. On the other hand, Nagi, who hates fat people, was looking at Mariko with meaningful eyes.

Mariko and Nagi save an old man who has collapsed on the roadside. Nagi is attracted to Mariko, who shows a different expression than at the group date, and invites Mariko out on a date.

Due to trauma from her student days, Mariko thinks that Nagi's invitation is a punishment game. The date that Mariko planned to get Nagi to move on was a "eat-till-you-faint tour?"

Mariko is invited to a hotel buffet on their second date. Mariko gradually begins to feel Nagi's affection for her, but when she sees Nagi agreeing to a date with another woman, their feelings become mutually exclusive.

Nagi contacts Mariko to clear up her misunderstanding. Their love accelerates as they honestly express their feelings to each other.

Mariko confirms her feelings with Nagi, but her boss at work tells her, "If you look like that, the other person will feel embarrassed." So, Mariko decides to go on a diet for the first time in her life to match Nagi.

Mariko, who has successfully dieted, heads to meet up for a date, looking forward to seeing Nagi's reaction. However, Nagi's impressions when he saw the thinner Mariko were different from what she expected…

Mariko enjoys going on a date with Nagi, but Nagi feels uncomfortable with Mariko's concern about calories. On the other hand, Rina's behavior is different from usual due to Moroboshi, a doctor who likes Mariko...?

Nagi is worried about Mariko not enjoying her meal as usual, but when he visits the gym,she witnesses Mariko and Moroboshi looking intimate... While the situation with Rina continues to be strained, what will happen to the relationship between Nagi and Mariko?

Rina grows dissatisfied with Mariko, who is liked by Moroboshi. Finally, the feelings she had been holding back exploded. On the other hand, Nagi heads to Mariko to confirm the relationship between Moroboshi and Mariko...!

Seeing Mariko doing too much for Nagi's sake, Nagi falls in love with the once happy Mariko, and frankly tells her that he wants her to remain as she is. What will happen to love, as revealed by two people who are new to love?