Daisuke is hit with something that makes all of his friends lust after him - weirding him out a bit from the sudden change - except for Ken, whose behavior is unchanged. Eventually it comes to light that it’s because Ken was already lusting after him and is used to dealing with (read: suppressing) these feelings.

Sex between Daisuke and Ken is fine and encouraged, but I’d prefer not the others - dubcon isn’t really what I had in mind for this. Daisuke and Ken should be 18+ if there is smut.