I feel like Ono is getting undeserved hate here--he had a crush, did his best to relate to her, and made another attempt. It's just the framing where we know Aya is already in a relationship that makes him come across as an antagonist, but he didn't do anything bad. He tried his best, and failed miserably because he did not know the full situation. Rather than "get fucked", I feel like "pour one out for Ono" is the more reasonable response. He simply didn't have a chance.