Kids, don't try this at home. The belly button is very easy to damage, thus the high sensitivity.
All you need to get abdominal infection is a bad poke through the belly button...
OU!?Hya!?was nothing....An Angel...MEDIUM
DAMAGEYou can't go touching an Idol's stomach!NAKA!?fufufu...Geeeeez!!T-That...What is it, Admiral!Commander, you perv!
You can't do that to the other girls!Kya!?'ya scared?nfu!?You're goin' too far there, jerk...