Comforting raw milk tutor

Airi decides to work as a private tutor at the request of Seiji, the eldest son of the Sasaki family who lives next door, who cannot give up on his dream of going to college despite his father's opposition. That first day... Airi waits alone in his room for Seiji, who hasn't come home from school, and is excited by the sight of a boy around his age, and ends up masturbating out of frustration. She doesn't even know that her father, Haruo, is watching her... After the incident, Airi notices that her bra is missing from her room. I told myself it was just for today, so I ended up going to class without a bra, but...