"Do you want to stay at my house for a while?"

Kuramine Riku, a second-year high school boy, is feeling down after getting dumped by his childhood friend. He enters a convenience store and happens to save the store clerk who was being attacked. The clerk is Ayana Hoshimiya, the most popular and beautiful gal in school. The incident causes Hoshimiya to tell him about her stalker, and the two of them decides to live together for him to protect her by pretending to her boyfriend...?

(Source: Young Ace Up, translated)