Can someone suggest a good yaoi manga please?

Yep, I'm going to be super specific about what I want.
WOULD LIKE (does not have to include all):
Bishonen
Teenaged or Older Main Characters
Yandere
CAN NOT HAVE:
Incest
Shotacons
Extra Quick Note: I don't mind if it's a soft story-based manga or a smutty 18+ manga.
Please can someone suggest a good one?
Thank you~