Only 4 pages but seems like the usual cliche, guy is together with a amazing girl with a good character and the body of a pornstar, he doesn't have the balls to even hold her hand, in public or private, girl somehow get in contact with a NTR guy that convinces her to have sex, she starts a relationship in secret (no idea if before or after she got together with cuck, usually is after and she does out frustation because she does want to do lewd stuff but doesn't want to start advances and appear in heat), her BF finds a account of a guy fucking girls around and no dodubt doesn't even notice the girl he just fapped to is hif own GF. Last picture is or a notification from the accoutn he follows about new stuff with maybe a face reveal or the guy using the girl phone to make clear she is his bitch now.
I used a app to translate the last page, the NTR guy sent a message to his follwoers saying he will probably delete the pic later, can't see her face but probably cuck would recognize her. Cuck dialogue is about that fap being awesome and he have to hurry to sleep to meet his GF the following day, he doesn't know.