Sensei o Haramaseyou! ~Hiyoko no Noroi de Toumeika Suru Ore!?~

Terutoshi accidentally kills a baby bird on his way to school, awakening its vengeful spirit. To fulfill the bird's unfulfilled dream of growing up and having offspring, the spirit curses Terutoshi with a single task: impregnate someone. Branded with the spirit's seal, his only option is to seduce his teacher, Ms. Sayumi. But the curse has a twist: whenever Terutoshi thinks of anything erotic, he becomes invisible! To regain visibility, he must navigate the school unseen, targeting Sayumi during lessons, breaks, and everywhere in between.