Heart Strings
![Heart Strings](http://fmcdn.mfcdn.net/store/manga/4574/cover.jpg?token=4173b711eeecd632e7cfbfd9689c0eb9a96e54ca&ttl=1720537200&v=1366062845)
Due to unexpected events, Sakaki ends up being Yuki's "customer" and he's touched by Sakaki's words... but after discovering that a sweet fleeting kiss was just a game, what will Yuki do? Never fear; keep strong and keep believing! A love battle showdown between a yakuza and his wife! (Includes unreleased pages.)
Loosely connected to 'Twin's Labyrinth'. The final chapter "Love go-round" also invovles Rin and Ayumu from 'Twin's Labyrinth'.