Not to be nit picky but shouldn't this pic be in the "Perverted Girls" pool instead of "Awkward Sex" since Maribel is masturbating (inappropriately) to her friend next to her by herself as opposed to engaging in mutual masturbation with Renko?
The translation makes this so much worse for them both.
This can't be happening...Renkoo...Eh...? This...why??Haa...aAh...Uh...What are you doing...? Stop that...Merry.Setting: After a couple of drinks in Renko's (Straight) home, both of them got on the bed to sleep, however, Merry (Lesbian) is stimulated by this situation and started masturbating in bed.
(Renko was actually awake, so she noticed Merry masturbating.)