FSET-770 - Hiding from teacher in girls' room during school trip

I bought this for Aoi Kururugi, but all three were great. Seeing them try to hold back their moans was incredibly cute. I went to an all-boys high school, so this was a dream scenario for me. Looking back at my own experience, it wasn't impossible to keep things hidden, so the premise felt realistic. School trips weren't a scenario I usually looked for, but I tried searching for similar works; most were just harem, orgy, pickup, or outdoor stuff, which doesn't really hit my fetish. This is currently one-of-a-kind, so I really hope they make a sequel.