Thank you very much for following this hard-to-read character background!It's an important place, so it necessarily became big. It's a big butt to protect yourself. Hooray!Her human(oid) butt, connected to the spider body, protects the middle part that carries the vital organs etc., and she's not embarrassed even in such a swimsuit. Rather, she finds it reasonable. However, since it's too indecent, next time I'll discuss it a bit, and cover the difference in awareness.Anyway, the important thing is that I can draw a big butt!
The backside becomes like this (see image). It's CUTE.