Most of the characters here are dumb, except for this scumbag Gohzou, coz he easily manipulates everyone. Fumi knows what Gohzou's personality is like, but she didn't tell the MC directly; instead, she's being cryptic about it and thinks the MC will get it. Emma knows about this Gozhou and Fumi's past, but instead of telling the MC, she decided to leave it to Fumi to tell the story. MC had a chance to get some info about Fumi's past (remember in the previous chapter where the MC and Fumi were talking in the car), but he stopped Fumi from telling it coz she's trembling this and that (This was only from MC's perspective, but I think Fumi was ready to tell him and he stopped her for telling it...) The childhood friend was also dumb, like you love the MC, but you're giving your body to this scumbag Gohzou to pleasure you just because you want to be an adult/mature... (like how come did she think that way? she's a college student, but her brain is kinda mid school/high school student)
I really hope the author gives the MC enough time to save the childhood friend... or maybe Fumi is already there with the police.