Seon Jae-chan, the intelligence service’s ‘snake,’ a human ampler and success-oriented human specimen, was a guide known for his evil acts committed in the name of unrequited love for Esper Go Woo-jin.

When faced with death, he sincerely repents the past and wishes for Woo-jin happiness. Perhaps it was because of this that Jae-chan woke up again 6 years ago…

The person I wished to lean on and rely on was such a young person.

Woo-jin was much younger and more beautiful than he remembered. Jae-chan made a new plan, this time to become someone who helps Woo-jin and other important people.

Jae-chan has succeeded in all projects except for his love for Woojin.
Will he be able to complete this project successfully as well?