It was a pretty simple story, but this was sooo cute!! Mc is ur average kind kindergarten caretaker. However, at night, he wears a wig and goes into casual sexual relationships. In one of his flings, he meets the ml, who was apparently straight, and he only did this because he was curious and needed this fling for a writer job. The mc got angry, but to his surprise, the ml was the uncle of one of the kids in the mc's kindergarten.
Shou Sensei no Ecchi na Himitsu