Origin
Creation
Seishiro Tsugumi (鶫 誠士郎 Tsugumi Seishirō) is a supporting character in the Nisekoi series that was created by Naoshi Komi. The series first began as a one-shot in Shueisha’s seasonal magazine Jump NEXT!, then it was serialized in Shueisha’s Weekly Shōnen Jump on in November 7, 2011.
Her first appearance was in Nisekoi Volume 2 CH. 15 “Rival“.