I missed like 2-3 volume in between. but Suzu have some very bad ship eh ? Hitting a girl for no good reason, i don't think you should find a partner like that. Even if it not a that hurt.
i know Japanese love that shit, the hate-love ship. So we probably won't have anything more than the sis-bro's jealousy. Being one side even make it worse
For Maki and Jan, at least it is actually misunderstood and how he talk actually a big flaw that recognize by the story, and the conflict it bring still around. Meanwhile over here: "she enjoy it"