Shouldn't a mushroom club be a club where you eat mushrooms you shouldn't be eating?
I couldn't quite follow Hiyama's actions and decisions in this chapter. Was her decision due to the Japanese custom/culture dictating that a marrying woman must leave work and become a housewife? Due to her personal history, she couldn't stomach that? Wouldn't getting together with somelike like that dude be the solution to that problem because obviously he couldn't support their family, so she would be forced to keep working? As developed as Japan is, I find it hard to believe getting just a single child would lead to getting fired from a governmental job. She could soon return to work and the dude could look after the child. I seem to recall she's not actually opposed to the very idea of dating a man, so that's not the problem. It seems a bit too overdramatic to me she'd be utterly opposed to marriage due to growing up in a divorce family. Just how many such families are there these days?