My happiness ≠ her happiness / 僕の幸せ≠彼女の幸せ

This work is mainly about cuckolding and cuckolding.
Tadashi Komano, the main character of an ordinary office worker, and his wife, Yahiro,
got married and lived a happy life.
However, when Tadashi hears about the man he had been dating with his wife Yahiro in the past , from that day on, he begins
to imagine that Yahiro will be embraced by another man different from himself .
Meanwhile, Tadashi, who has been entrusted with a big job, meets a young president of a business partner ...