Why people keep on about Osanai ship I dont know. He made it clear to start with he found her more irritating and was about big knocker gal. Stating at start he wanted gal number form Osanai is so friend zone. Besides, Otaku deserves to have the whole thing burn to flames as he just comes off as a cuck who thinks someone is interested because "gasp" she SPOKE TO HIM!
Seen all this before IRL, they are all using him like a toy for fun and not in a nice way, he will learn the hard way very soon I expect.