Kinbaku Date: Toshishita Kanojo ni Shibararete

Now that Momoka's childhood friend Ruri is a beautiful grown woman, she's starting to hope they can become more than just friends. Ruri feels the same, but she's convinced that her way of loving would scare Momoka off after just one date. Chalking it up to low self confidence, she calls her bluff, only for Ruri to demand the older girl walk around tied up with rope under her clothes! Momoka will do anything for Ruri, but can she do this?

(Source: Irodori Comics)