Lee Kyungmin is a sixteen-year-old student who sees the world through the lens of suspicion. On his very first day of school, what should have been an ordinary routine turns into the beginning of a personal investigation when he starts noticing strange patterns, unusual behaviors, and unsettling connections among his classmates. From a tycoon's guarded son who prefers solitude, to a carefree dancer who lies too easily, a notorious troublemaker who fears nothing, a gentle vocalist hiding quiet emotions, and a charming senior whose kindness feels dangerously intentional-everyone seems to be hiding something. As Kyungmin's observations pile up, harmless curiosity evolves into a full-blown case. Public assemblies feel staged, punishments feel performative, and secret rooftop meetings suggest something far bigger than teenage mischief. While friendships, admiration, and unspoken crushes form quietly in the background, Kyungmin documents every glance, smile, and coincidence, convinced that the school itself is concealing a secret. What begins as a comedic, overactive detective mindset slowly turns into a tense coming-of-age mystery-where love, rebellion, and hidden bonds intertwine, and one boy's obsession with uncovering the truth may lead him straight into the heart of it.

"mami, kok mami bisa sama papi sih?" tanya kyungmin "bisa dong, emng kenapa?" tanya youngjae kembali "papi kan cuek" jelas kyungmin ---- "was it casual kak? temen? temen apa yang nemenin kemana mana, ciuman, dikenalin ke orang tua, tidur diranjang yang sama, rangkul rangkulan?!" - youngjae "temen hidup! sadar youngjae! selama ini kakak mau kamu!" - shinyu ---- shinjae story shinyu : top youngjae : bot only shinjae no one else