Teaser Date Kanon
Let the Nightshine In
NTR'd by Clumsyness
NTR'ed by My Friend
Tenants of the Dead (it's implied MinJee was cheating succeptible even before the game events if one reads between the lines)
Holding Hands (although that one was also left unfinished, but still worth the play imo)
Maybe try some of the NTR Phone/NTR Girlfriend if you're fine with the phone interphase PoV
Are similar-ish ones that come to mind.