I forgot the title of the manga and I want to read it once again, so please help me
The summary: the uke is sickly so his father (a doctor) keeps him in a ward. His classmate (the seme) was assigned to give him his school work. gradually they became close, especially since the uke has no friends and visitors other than him. The father didn't like their closeness, so the father locked the uke in a tower (?I don't know if I remember that correctly). Unable to escape, the uke decided then to bomb himself and the tower, and the father is looking around the debris for even a smidgen of his son DNA so that he can clone it, then the seme proceeded to be angry at the father.

that is the story of the manga, but no matter how much I describe it in google, I can't find the title.