Cheerful, soft-hearted Morisaki and cool, silent Taguchi have been friends and lovers since their high school years. While their relationship has not been without its challenges, they've managed to get past them and live happily together... But they're not actually "living together," unlike their friends Yoshimura and Shima, who shacked up halfway through their college life. Will their friends' decision inspire Morisaki and Taguchi to start thinking about their future?