Thread:B214/@comment-27083298-20170603032731/@comment-30924344-20170603150858

Ah I actually just found what oppai really means. It's a slang term to refer to a woman with big breasts. Oppai comes from the term “ippai” which means “a lot of” something. In this case, oppai means a lot of chest. So the title does make sense after all: "A Lot of Chest is the Sun".