Who Decided That I Can't Do Romantic Comedy in Reality?

"Rom-com Realization Plan" That is the dream of Kohei Nagasaka, a high school student who loves the world of romantic light novels more than anyone else! Through careful data collection, he had planned to turn fiction into reality on the day of the "confession event." But the person who appeared before Kohei was not the person he planned to confessed to, but another girl he didn't know at all!? (Source: Big Gangan, translated)