My Childhood Friend Refuses to Accept Defeat

Childhood friends Yuukiya and Miku still play the "I Love You Game" that they started in sixth grade. The one who blushes after saying "I love you" loses. —It was just a simple game, but Yuukiya has fallen in love with Miku, and his feelings are about to overflow. He stubbornly insists on winning the game, but ... An unexpected upheaval awaits them as they enter high school!