Four close friends, Shun Matsuoka, Kaname Tsukahara, Yuuta Asaba and his twin brother Yuuki Asaba, have entered their second year at Homare High School. Shun is amiable and joyful, Kaname is fiery and short-tempered, Yuuta is kind and laid-back, and Yuuki is lazy. When they welcome Chizuru Tachibana, a creative but troublesome transfer student, their dynamic group takes an energetic turn. Chizuru's adventurous proposals and ideas add a burst of excitement to their otherwise mundane lives. As they embark on new encounters and experiences, they gain more insight about each other and develop a better understanding of themselves.