The design for Joe in this is very cute, but for me that's all this manga has going for it. They kinda ruined Sara's personality and she's very generic now.
I agree with what everyone else had expressed already- they ruined how the characters look and act, especially Keiji.
It's fun to see this in a manga format but I don't consider this canon in the slightest. It's cute and all, but after a while I realised that any "hype" I felt from this manga was purely driven by how much I love the game. I'm not saying that this thing is the worst thing on earth- there are many worse adaptions of games and manga out there. But I can't get over what they did to Keiji- what is he, 5,4 now?