It's interesting how the set is just a POV blowjob and nipple play, but the "seme" in the title gives it a bit more meaning. I was just familiar with "seme" in "uke/seme" pairings for BL, but looking it up, it means something like "attack" and is also a term used in martial arts. So Double Seme probably means Double Attack and is supposed to be them going "on the offensive" here.

I should really just buckle down and learn Japanese.

Base +14