Uke gets turned on by men looking all sad and lonely. He took pity on Natsuro and wanted to sleep with him, which felt a bit questionable about the consent (but it's still okay, I think). Uke kept seeing other men due to him getting horny over all these broken men. When getting caught and confessed to, Uke half-asses an "I love you, too" and not even understanding that usually, the other partner does not want to see one fuck with another. Dude really didn't understand such basics. Though, Uke did probably somewhat get manipulated by the (Ex) Husband of his dead sister, who took advantage of him due to the similarities in his looks and well, figuring out that he gets horny over miserable men. Uke and Natsuro do have a happy ending where they end up together, monogamously, but it still feels disappointing. I just don't like the Uke because of how fucking dense he was for so long. Natsuro deserves better, and yet got another troubled dude.
Over Squall