
How insecure do you have to be for you to not even believe the things you yourself has experienced? It's like he's been having doubts with the relationship since the start and now that a reason which confirms it was revealed, he immediately disregarded all the signs that says their love is mutual. Even if it is a prank, did he really think someone will go through it to the point where they're having sex regularly? Mc has been nothing but welcoming when it comes to it too lol.
Anyways, it's actually sad how fast he is to believe someone else rather than his own judgement. Ml's self-confidence definitely needs more work...
(Honestly tho if someone did that to me and they've been nothing but enthusiastic with our interactions, and being such a great lover, I'd definitely assume that they do actually like me despite whatever it is that started it. Cuz all that effort for a prank? Ooohhhhh you like me so much~ )