The only thing that would save this shit show would be that Mei goes through with the wedding and when she meets Yuzu again, she'll go "Good bye (again) Yuzu and be happy with someone else, this is for you own good" to save her the suffering but then Yuzu kills herself instead making Mei suffer with guilt for the rest of her life for being such an autistic shitbag of a person.
Would make for a decent comedy ending.