Now we go from a weird early CLAMP work to a later work which might be the slashiest thing that CLAMP has ever written, which really says something considering their body of work.
LEGAL DRUG (Gohou Drug), by CLAMP. First published in 2000 and first published in North America in 2004.
PLOT:
Kazahaya wanted to run away from his past. Rikuo wanted to find a missing woman from his. Their quests ended up leading the two to the Green Drugstore. When the two aren't stocking shelves and fighting with one another, their mysterious benefactor Kakei sends them off on strange supernatural quests that force the two to confront the mysteries of their pasts.