Tsukasa and rui used to be close friends for a long time, but tsukasa suddenly stopped caring about himself. Rui was trying to take care of tsukasa, he always tries to help tsukasa or talk to him. Tsukasa always try to avoid rui so he wont find out that tsukasa secretly suffers from the disease called Hanahaki disease. You knew that rui did not love you back so you accept that you are slowly dying from this disease.

"Hey! Wait. Share umbrella with me. its raining, idiot." He opens his umbrella.