Responses
He said that because he wanted to get his Azusa san back no matter what.....be it by binding a shackle of "an unexpected pregnancy" even..... Azusa did say that he was immature and childish....that was one of his childishness without thinking about the consequence or, how the other party can get back at him

''but, if you pregnant contact me'' touya said that ヽ(`Д´)ノ what a bastard ╮( ̄▽ ̄)╭