The Anime Lad
High school student Natsuo has an impossible crush on his teacher, Hina. At a party, he meets the blunt Rui and makes an impulsive choice he expects will remain disconnected from school. He now has two situations he cannot discuss honestly and no evidence that avoidance is a workable management system.
Super Eyepatch Fox
Natsuo wants his teacher Hina and knows the situation is impossible. At a party he meets Rui, a stranger with a direct proposal and little patience for romance. One reckless evening gives him another secret to carry. Morning still arrives. School still expects normal attendance.
Gigguku
Domestic Girlfriend gives Natsuo an impossible crush on his teacher, then adds one impulsive encounter with Rui before he has processed the first feeling! It is shamelessly constructed melodrama, but the opening works because ordinary school life keeps pressing against everything he cannot say. The tension is immediate, messy, and built from choices rather than coy almost-confessions.
Father's Basement
The setup has the careful restraint of a tabloid headline. Natsuo longs for his teacher Hina, goes to a party, and makes a rash decision with Rui after barely meeting her. The useful friction comes from his belief that each problem can stay sealed away from the others. That is obviously poor judgment, which is at least more active than romantic gridlock.