When That Day Comes

*This work is serviced simultaneously on Ridi Webnovel in both 15+ and 19+ versions under the same title. Depending on the age rating, some scenes and story developments may differ, so please select your preferred age rating before using the service. When I opened my eyes, I was inside a fantasy novel. And it happened to be the morning of my union ceremony with the protagonist. Park Shin-ui was a mere one-line extra, but suddenly, he became the sole guide for the novel's strongest Esper, Kang Tae-jun. To make matters worse, while his ability is S-class, his body is the weakest of the weak. In order to return to reality, Park Shin-ui makes a decision. Instead of staying on the sidelin...