Trying to find a manga i only vaguely remember. I'm pretty sure it was shounen ai (maybe y...

Trying to find a manga i only vaguely remember. I'm pretty sure it was shounen ai (maybe yaoi?) And all I remember is one of the main characters being attacked by their mom (who im pretty sure was mentally unstable) and they hurt her and she had to go to the hospital. And I think she lost her memory or something, thats all I can remember.