First study session: "I want to practice kissing! Please kiss me!"
Second study session: "I want to practice different ways of kissing! Please give me a deep French kiss!"
Third study session: "I want to practice 69ing! Please do it with me!"
(The way things are going, this is my prediction. Oh, and of course Rin will accept, as she is incapable of saying no to cute & adorable Mayuki-chan.)