With love being a source of potential pain, Tomo Mikage, a shy graduate student studying botany, has kept his heart closed off. But fate plays a different hand when Youji Nanahoshi, a senior in the same seminar, enters his life. At first hesitant due to Nanahoshi's height and confident aura, Mikage quickly falls for his junior's kind and gentle nature. Upon noticing Nanahoshi's well-being isn't optimal, Mikage offers to be roommates with him. Sharing a living space allows their romance to blossom until finally, they confess their love. Though they lack experience in love, Mikage and Nanahoshi vow to make it work. Encountering unfamiliar ground, the two guide each other through the obstacles and insecurities they face, deepening their bond day by day.