Fish Tied with Fate

Issei and Ryoichi are cousins. Issei is outgoing and friendly, while Ryoichi is gloomy and a loner. Even at a young age, Issei always looks after Ryoichi since the latter tends to discomfort people and has no friends. The relationship between the two has always been complicated, even more so now that they're adults. Just how more complicated could it be?

(Source: Futekiya)