Natsuki Hashiba (羽柴 夏樹, Hashiba Natsuki) is the main protagonist of the series. He is in love with Anna Kobayakawa
Natsuki has slightly messy blond hair which reaches his mid-nape and brown eyes. Most of the time, he is seen wearing his school uniform, consisting of a white collared dress shirt with a red necktie worn under a beige cardigan, a blue long-sleeved vest, greyish-blue trousers, and brown school shoes.
Natsuki is quite jolly and optimistic. He easily puts trust in people and can be naive at times. He is shown to be quite innocent and can be easily tricked. He is a hopeless romantic who immerses into his delusions of love. Although he is constantly bullied by his friends, he values their friendship.
He lives with his sisters, whom are all hostesses. As a result, he usually receives expensive hand-me-downs from them. His hair was originally black back in the middle school.
- His name "Natsuki" means "Summer Hope"
- He is voiced by Yoshitsugu Matsuoka who also voices as Kazuto Kirigaya/Kirito from Sword Art Online, Sora from No Game No Life, Lubbock from Akame ga Kill, Bell Cranel from DanMachi, Kanata Age from Sky Wizards Academy, Miyamura from HoriMiya, Souma from Shokugeki no Soma, Tohru Yukimura from Aoharu X Kikanjuu, and Aki Kaidou from Super Lovers.