I love it when romcoms and harem mangas try to explore what it's like from the other side of things.
Oh, yeah, it's so funny when the romantic interests are jealous or have a misunderstanding, right? No, it isn't. Realistically, it would be as with Karin here: she knows she's jumping to conclusions, but she can't help it. She feels sad, doubts herself, loses her appetite and is about to cry. Thank the god of magical girls that she doesn't suffer from the "absent parents syndrome" and has a mother who can help her.