With the announcement of Kouhei Takeda's (Otoya Kurenai / Kamen Rider Ixa) marriage, Koji Seto (Wataru Kurenai / Kamen Rider Kiva) had congratulated his co-star on his Twitter referring him as father considering their father-son role in Kamen Rider Kiva.
Father... Kouhei-kun... Congratulations.
For this, Kouhei Takeda replied
Wataru... Thank You. No, Koji Thanks! Even I am married now~. I wish that someday we can work together once more...