I think we know why little Mashu is so lewd now - he's teaching her these things and then gets surprised when she tries to test them out on the only guy she knows.....
Not bad... Not bad at all!But... Da Vinci-chan just doesn't get it!Da Vinci-chan does get it!VAVOOM!Ah, there was one like that too!Namely, Maid Alter's 2nd Ascension's Maid-style one!That's certainly lewd, but it's so healthy!What's needed is immoral lewdness!That's simply not sufficient enough to garner a chemical reaction from the seemingly honour-student Mashu!