I think its pretty good that the next chapter didnt focus on the kiss, maybe Aka and Mengo- sensei really are just using the incest plot as comic relief. Hope it will continue this way cause my interest in this series suddenly went up! Unlike this past two chapters.
lowkey, I think Melt and Ruby are a good pairing. Maybe the creators are trying to see the chemistry within these two!! After all it's almost impossible for them to interact so they made Melt be the actor assigned for Goro sensei. Cuz if we're adding a romance subplot here I think the best character to have one is Ruby, it would be like a great character development for her to finally let go of her childhood crush and family traumas. Maybe Melt might be able to help her get over her mom. ( cuz tbh, all of it started with her, specially her crush with her doctor/bro) her feelings with doctor Goro is somehow viewed as a substitute affection she was looking for from her mom. This is also tranfered to Ai, but she was still haunted by the trauma even up to this day. I think Aqua also realized this so he is just acting as if he doesn't care cause he doesnt want Ruby to breakdown completely if he were also to reject her.
Tbh, Ai's revenge might not be the major plotline in this series, cuz the 'reveng/movie arc' is just too fast so my prediction is the major plotline is about Ruby's past. We know that one of the producers in their film is her past life mom so Im excited for that.
