Masuzu Natsukawa

, 夏川真涼

Masuzu is eitas classmate and girlfriend. a high school student in her first year, who spent nine years abroad. she's known as the school beauty and frequently receives confessions from male students. despite this, she maintains a fake relationship with them. masuzu is confident and mischievous outside of school, often behaving deceitfully. like chiwa, she struggles in the kitchen and isn't much of a cook.

Spoilers:

Like Eita, she actually hates romance and only blackmails him to be her boyfriend to stop getting confessions from people. In novel 4, Masuzu reveals that she hated Eita from the beginning, as he was the only one who wasnt charmed by her face or look like he was paralyzed just by looking at her. Her real personality is sadistic: she loves seeing peoples depressed faces, but doesnt want to show this to people because they would hate her. In the end of the anime, Eita chooses her over the other girls. She has a complicated relationship with her father who lives in Sweden, and refused to go back there because of Masuzu searching for her mother, who was outcasted by him.