Toki-sensei wa Kigaetai Ms. Toki Want to Change Clothes.

Synopsis

Meet Shisoya Toki, a quiet female teacher with a thing for "clothes." Often seen as cold and unfriendly, her students call her the "unfortunate beautiful teacher." But one day, while organizing supplies in the old school building, she finds a brand new pair of bloomers. Suddenly, her kinky curiosity about "clothes" goes wild!! Sometimes SEXY, sometimes CUTE—get ready for a wild ride full of seductive cosplay! (Source: Nihonbungeisha, translated)