In order to thank the honest and kindhearted girl, Subaru offers to help in her search, and later that night, he even finds the whereabouts of that which she seeks. Fortunately, a mysterious beauty named Satella, in hot pursuit after the one who stole her insignia, happens upon Subaru and saves him. Armed with only a bag of groceries and a now useless cell phone, he is quickly beaten to a pulp. Things aren't looking good for the bewildered teenager however, not long after his arrival, he is attacked by some thugs.

When Subaru Natsuki leaves the convenience store, the last thing he expects is to be wrenched from his everyday life and dropped into a fantasy world.

But in reality, they just share the same secret pain: they are both in love with other people they cannot be with. To the outside world, Hanabi Yasuraoka and Mugi Awaya are the perfect couple. As these two lonely souls spend more time together, they decide to use each other as a substitute for the one they truly love, sharing physical intimacy with one another in order to stave off their loneliness. Through a chance meeting in the hallway, he encounters Hanabi. Mugi was tutored by Akane in middle school, and has been in love with her since then. However, Narumi is soon noticed by the music teacher, Akane Minagawa, and a relationship begins to blossom between them, much to Hanabi's dismay. Hanabi has loved her childhood friend and neighbor Narumi Kanai for as long as she can remember, so she is elated to discover that he is her new homeroom teacher.

Kuzu no honkai hanabi and mugi