After a breakup with his girlfriend of three years, Hideto Hisayama, a man with a broken heart, calls a girl on a “consultation app” in search of healing. “Are you by any chance… Otoha?” “Ehh!? Don’t tell me, Hisayama-kun?” The other party is, of all people, the plain and unremarkable girl from his class, Yuuna Otoha! “If you’re okay with it, would you like to talk about it at school?” “Are you sure?” “Of course. I can’t just leave someone feeling down.” A relationship that began by coincidence, a one in 120 million chance. Just a temporary relationship to offset my loneliness. Or at least, it was supposed to be. “I’ll be there for you until the day I die.” When Yuuna’s kindness melted my frozen heart, I felt…