Yumi sweetheart YOU DESERVE THE WHOLE WORLD ILYSM I get that what Kan-chan did was inexcusable but he did have a traumatizing past, which eventually changed his whole character. I think Yumi was always in love with Mayama and basically made Kan-chan fill the empty void (he still fell in love and loved him) and when he re-encountered his first love he began to realise how much Mayama understood him. I really feel Yumi so bad but I can't stop but love Kan-chan's character.