The high school boy protagonist turns to his childhood friend and neighbor Rio who's a university student, to help him study for his college entrance exams. Note: the untranslated oneshot "Open Family" is not a...

"I hate summer." The reason being... that my cousin Yuzu comes to visit every year.Whenever the two of us are left alone, she does all manner of things to me... It really peeves me off how she plays and toys...