Oshi no Ko

[MFauli]

I'm assuming that "lovers suicide" is a nice way to say "husband murders wife over infidelity, then kills himself to avoid the stigma", and society sometimes accepts this as true.

That's not what I'd call a "lovers' suicide". To me, that is when two people love each other but the circumstances require them to kill themselves, because living apart is unimaginable for them. See Romeo and Juliet.