As a domestic violence survivor, i am appalled.
Victim blaming is a huge aspect of this manga series. It's suggested in multiple chapters, that men and women who are abused by their lover did something to deserve it by doing such things has having lunch with a colleague or not reciprocating feelings. Which is disgusting and wrong. Especially when so many people die because of domestic violence on a daily basis. This could of been a beautiful story of hope and love but it was tarnished. All it does, is add to stigma.
If you are being abused (regardless of gender identity or sexuality) please seek help and avoid this manga at all costs.