Kyouai Shinri Paradox

Assistant Professor Tachibana Yukinari is in love with his little brother. He left the house to hide his feeling, but his little brother Takayuki entered college where he teaches to follow his brother. Yukinari's heart would go fast just by a simple touch from Takayuki, when he thought he's hiding it well for others to know there's one student that noticed his feeling for Takayuki.
“Aren’t you crazy to lust over your little brother?” a student from psychology department Ichijou Kazusa started to threaten Yukinari….