I'm so happy that the story is picking up real fast now. Also this is still, even more proof, that Ooki is just a decended God that's fucking with some mortals. She sat down next to Okada thinking "Haha stalker go brrrrrr" I guarantee it.
This is pure comedy, you can't even ship them because they're all crazy. Kouhai clearly is gonna kill him; block girl will blue ball or ntr him and big boob will probably put him in a maze to survive ha ha ha.