i understand people are saying the mc shouldnt feel bad because she was the one who felt unworthy of him,
but this bitch strolls into his room, says she wants to be his family, fucks him, and then dips like it never happened.
that isnt best girl and that isnt what i would consider being "family."
family members never abandon one another, even if times get really tough.
you cannot blame the main character for feeling cast aside, especially after all he went through in his past life.
you cannot blame him for feeling like he is the failure after all he went through to protect her...
and then she throws it away because she cant stand being weaker than him.
that's pure selfishness on her part, and it is frankly just petty and stupid.