Aishiteru Game wo Owarasetai Episode 3

In sixth grade, childhood friends Yukiya Asagi and Miku Sakura created a game with the objective to embarrass the other person by taking turns saying "I love you." Four years later, even as they are entering high school, the two are still trying to one-up the other and claim victory. However, as tender feelings begin to bloom in their hearts, the simple phrase has taken on new meaning beyond the rules of their game.