Marmalade Boy Little - Vol. 5 Ch. 27

[MangaDex]

 

[aryllelric]

Huh? Are they not literal half siblings? 🤢

 

[junkyualanim]

Huh? Are they not literal half siblings? 🤢

you didn't really read the manga did you?
it's even obviously clear that they're NOT blood related though they shared it with their older siblings. So no, they aren't