I think the rest of the text is "wanna see my armpit?" "well, pay up a yukichi." but since japanese AND English aren't my native tongues, I'll take it easy.
*slip*Wanna see my armpit?Well, express your sincerity.
The furigana for "sincerity" is "(Fukuzawa) Yukichi", a Japanese equivalent word for "Benjamin" or "$100 bills".
Truly an ARMPIT MIKO.Here hereLook look