For the people who don't know what "The moon is beautiful" usually is meant to imply: https://www.quora.com/Why-does-The-Moon-is-beautiful-Tsuki-ga-kirei-desu-ne-mean-I-love-you-in-Japanese
You got to know when to hold 'em, know when to fold 'em,
Know when to walk away and know when to run.
You never count your money when you're sittin' at the table.
There'll be time enough for countin' when the dealin's done.
Sounds like he's going to turn evil anyways. MC was able to prevent the first path but that was only with previous knowledge. Seems like it's just the kid's nature