The hidden popular spot of the school is the duty room! You can eat tea and sweets, and there is a kotatsu in the winter to keep you warm! However, in the duty room, the innocent students are being teased by the perverted teacher's extra thick fingers next to their bloomers and panties in their innocent slits! "It tickles!" they say, laughing innocently at first, but then the innocent students become addicted to the pleasure of their slits and escalate in their desire for pleasure!