So this chapter they kiss and they both cry after and feel bad about it, which would seem like a bad sign for their relationship, but I think they’re both doing really well with each other and just don’t realize it. Emma feels bad because Suzu is in love with Yuki and is just using her as a substitute, which is basically what’s going on. What this chapter shows though, I think, is that Suzu is already beginning to see Emma as her own romantic interest. While kissing she thinks of Emma “Emma you’ve always… You’ve always accepted me for who I am.” And then after “Emma is really kind. She always accepts me, regardless of how ugly I become. She always comforts me.” Which is extremely promising, because she fell in love with Yuki for those exact reasons. Yuki accepted her when others rejected her, was kind, and comforted her when she was hurting. Now Emma is filling that role.
I think part of what’s digging at Suzu is that she’s noticed that Emma isn’t as sexually eager as she is. In an earlier chapter she found herself surprised (perhaps disappointed) that her agreeing to a relationship with Emma didn’t mean they’d be kissing a lot. She teases Emma for being embarrassed at “spicy scenes”. In this chapter, Emma initiates the kiss but Suzu is the one who gets really into it (as if, maybe, she had been holding back). I think the fact that Suzu is older plays into this. Of course, Suzu hasn’t realized that the one Emma loves is her yet (I think. Emma isn’t hiding it very well. Maybe she’s subconsciously picking up on it and feels bad about playing with her feelings.)
Personally, I don’t expect this to go in a toxic or tragic direction. I think they’ll have their ups and downs and their dramas, but in the end they will be happy together.