I've been through a situation like Yuiko before. It takes a toll on mental health and isn't a joke. I understand her on a certain level BUT I would never pick Aya over Yoshida. Aya is emotionally abusive and will be physically abusive (especially if Yuiko had eyes for another guy or hadn't like him) On the other hand, Yoshida treated Yuiko like a human and respected her, never forcing her to do want he wanted and ESPECIALLY letting her make her own decisions. Yuiko definitely needed a backbone in her character and no one should be dating such a guy irl. You can enjoy the story BUT never learn the mistakes they make. Never treat anyone like that the way Aya and Yuiko's sister did either.
Onee-chan Dorobou