Is there some crucial bit of backstory we haven't got yet? Eg. when mom says "I guess Koyuki really let it get to her" I have no idea what she's referring to.
^^ If your content is reposted to a site that does have ads or other stuff through which the site seeks to profit from posted content, you have the right to be damned pissed off about it.
Chapter 48 pages 5 and 11 have an errant "to" as preposition for "ask" -> "questions to ask the other girls" and "You can ask Kusakabe your question" (or to preserve the word order "pose your question to Kusakabe").
I'd be completely at sea with these chapters without the character graph.