Kai Tamaru

Kai Tamaru (多丸 快, Tamaru Kai) is one of the supporting characters of Koi to Yobu ni wa Kimochi Warui series. He is a classmate of Ichika Arima who develops feelings for her.

Appearance
Kai is a 17-year-old high school student with long, unkempt black hair and green eyes.

Kai wears the high school uniform, consisting of a blue blazer, gray sweater, red tie, and brown pants with formal shoes. He has a somewhat slender body type. He is noticed by the girls of his class to be quite handsome.

Plot
The boys are discussing who is the most beautiful girl in their class, but Kai is distracted and doesn't listen to their conversation. He ends up getting hit by a ball in the head by Ichika Arima, who comes and apologizes, but makes all of his classmates laugh.

Later after school, he reads Forward World and Ichika sees him, commenting that she loves the series too and is excited for the upcoming anime. As she only has the first three books, he offers to lend her the rest. Kai asks her if she is going out with Rio Amakusa's brother, as during the festival he saw them hugging. Ichika denies it, explaining that she was just showing him around and that it was an accident. He warns her to not take him seriously as he looks like he is just teasing her.

Ichika Arima
It is confirmed that Kai has feelings for Ichika.

Etymology

 * The name Kai means "cheerful, pleasant, agreeable, comfortable" (快).
 * Kai's surname Tamaru means "many" (多) (ta) and "round, circle, pills, purity" (丸) (mura).

Trivia

 * Kai's blood type is A.