Responses
Lol no, it's not a hidden finger. It shows on the side that he's was wiggling that finger to show that was his gold finger.
XD OMAGODS you're right!!!!!
Tbhnuiimgcrrctv is right. It's a way to show movement. But lol. It does look that way. :D
Is it just me, or there's a hidden finger at : http://www.mangago.me/read-manga/deki_no_ii_kiss_warui_kiss/an/deki-no-ii-kiss-warui-kiss-chapter-3.5.html/14/
Of the bottom panel .