http://www.mangago.me/read-manga/renai_kyoutei_nukegake_nashi/mf/v01/c004/7/ I liked the story, it was cute, and Masami was dense as hell. But regardless of his thoughts of "no I'm wrong, Ryuji always treated me nicely," he was being coerced into sex with the threat of Ryuji essentially pouncing aggressively on Shirou, his best friend. So no, he isn't wrong in thinking he was threatened :/
http://www.mangago.me/read-manga/renai_kyoutei_nukegake_nashi/mf/v01/c004/7/
I liked the story, it was cute, and Masami was dense as hell. But regardless of his thoughts of "no I'm wrong, Ryuji always treated me nicely," he was being coerced into sex with the threat of Ryuji essentially pouncing aggressively on Shirou, his best friend. So no, he isn't wrong in thinking he was threatened :/