Rina Nagai develops a new method of working out her boobs. Tie a ribbon underneath your tits and lift. I’m not sure what the health benefits of her new exercise are, but I do know this much, it looks fun.
Saaya Irie exercises her boobs more traditionally.
source:
永井里菜、「ダンまち」の“例の紐”で”ロリ巨乳を動かす！