Honestly, I like NTR-Kun more than the main couple. He's so absurdly funny by failing all the time, whereas the main couple's bit is "SEX, WE LOVE SEX."
Every comedy duo has got to have their straight-man, the Wile E. Coyote to their Roadrunner, the Elma Fudd to their Buggs Bunny, the Mouse to their trap.
Honestly, I like NTR-Kun more than the main couple. He's so absurdly funny by failing all the time, whereas the main couple's bit is "SEX, WE LOVE SEX."