This was funny, but I could have done without the twist about Ichinose also being Rika's sex friend, partly because I'm not all that much of a fan of teacher-student pairings.
Incidentally teachers in the US will also make home visits, but only if something is seriously wrong. Like with that one student my mom had, in kindergarten, who stole ~$3,200 in eyeglass frames... at a doctor's appointment the school had arranged and paid for... well the mom watched... all recorded on security video. Oh and it turned out the kid did need glasses.
