Clannad: After Story - Mou Hitotsu no Sekai, Kyou-hen

On a rainy day, Ryou Fujibayashi finally confesses to Tomoya Okazaki, and the two begin dating. Kyou, Ryou's outspoken older twin, does everything she can to support them, even when that means staying close enough to watch a relationship that quietly hurts her.

Rumors at school make the tension impossible to ignore, and Tomoya begins questioning feelings he had never forced himself to name. Ryou's sincere affection, Kyou's hidden emotions, and the sisters' devotion to one another turn a simple romance into a choice that can wound all three of them. Happiness will require honesty, but telling the truth may be the cruelest thing any of them can do.