Sekai Saikou no Ansatsusha, Isekai Kizoku ni Tensei suru Temporada 1 Episódio 3

Lughs magic teacher is a pretty girl named Dia. Being a few years older than Lugh, Dia treats him like a younger brother and sneaks into his bed every night in order to sleep next to him. Because he needs her to teach him magic, Lugh cant complain, but gradually he and Dia grow closer--