Although he knows little about the fleeting nature of adolescent love, first‑year student Kazuhiko Nukumizu still wonders how he would behave if his ordinary days were turned into a romance. He considers himself a background figure, content to keep living as an introvert with almost no social interactions. Yet suddenly he is pulled into the limelight when he sees his popular classmate Anna Yanami being rejected by a childhood friend inside a family restaurant. Nukumizu would rather forget the scene, but Anna forces herself into his confidence, grieving over being a childhood friend doomed to lose her beloved. Drawn deeper into Anna"s plight, Nukumizu quickly becomes entangled in the love triangles involving Lemon Yakishio, an energetic track‑and‑field athlete, and Chika Komari, a timid literature club member. The dynamics between the girls become increasingly complex, with Lemon's confidence masking insecurity and Chika's reticence hiding a longing for connection. Now pushed out of his safe bubble, Nukumizu finds himself the central figure in a cascade of doomed girls. Now, as the unseen observer transforms into an active participant, Nukumizu must navigate a web of emotions that threaten to unravel his once calm existence.
