Kinou nani tabeta? is not BL! It runs in a dudes' magazine. It is episodic sitcom for general audiences that happens to star gay characters. Like, idk, "Will & Grace" or something? I never watched those shows so I can't give good examples. Of course the fujoshi are reading it because they're Yoshinaga Fumi fans, but its rhetorical aims are v. different from BL. It's like, "Let's very gently introduce mainstream readers to the concept of two men cohabiting, and distract them with recipies and luls until they practically forget about the scary homosexuality part."