"Will you stay over at my house starting today?" Riku Kuromine, a second-year high school student, became despondent after being rejected by his childhood friend. He happens to enter a convenience store and saves a clerk who was being attacked by a robber. The clerk turns out to be Ayana Hoshimiya, the most popular and beautiful gal in school. As a result of this incident, Ayana asks Riku to protect her from a stalker and they start living together under the guise of him protecting her as she lives alone.

Kazuto Ayanokoji is an ordinary high school boy. He spends his days playing online games as a hobby. One day, he discovers the true identity of a friend who is so close to him that they are married in-game. It turns out to be a cool idol from the same class, Rinka Mizuki. As Rinka tries to act as his wife in real life, Kazuto is forced to lead a dizzying life.