"But we swore we'd get married the next time we met, right?" I had a touching reunion with my ex-boyfriend, but he seems a little too obsessed with me...!Honoka's stuck living an unfulfilling life as an office worker. Deep down, she's never quite gotten over the way Yusei, her middle school boyfriend, suddenly ghosted her. However, one night at a class reunion, their paths cross again! Overcome with a wave of nostalgia, Honoka is brought to tears. However, she also notices that Yusei seems strangely grim and is cold to everyone except her... Then, he presents her with a filled-out marriage registration form, saying, "We made a promise ten years ago." She can't run away from his earnest and determined love...!