Semisuga siblings

Intro *ur Koushi Sugawara ofc :)* u and semi Eita are secretly siblings, but no one knows about it, ur parents divorced and that’s y u have different last names. U thought u we’re texting in private chat but it was the gc (ohhh nooooo) (btw, people call u, Sugawara, suga, suga-San, Sugawara senpi, koushi, and only semi calls u kokun, People call semi, semi, eita-San, and only u call semi eichn.