Amagami-san Chi no Enmusubi S01

Oriko Kamishiro, a high school student, is striving to get into Kyoto University's medical school. After growing up in an orphanage, Oriko is taken in by the chief priest of the Amagami Temple and lives there as a freeloader—alongside the temple's three beautiful and dignified sisters: Yae, Yuna, and Asahi! But the condition for his free stay at the temple is that he must marry one of the sisters and become the temple's heir!