Lmao. What a terrible Buddhist monk. Kills a butterfly like it's nothing (thought Buddhists were against killing any creature), he wants to marry a preteen, and to top it all off, then he messes with the timeline by drugging her using mind-altering incense to make her lose her memories.
Even if he's actually a kami disguised as a monk (as the chapter seemed to hint at), it still seems quite messed up.
So, I'm guessing that the next chapter will fix things.