Luka Hiina An adult member of society, a full-time employee at a "white" (ethical) company. He has a younger sister named Hina Hiina (a high school student) who constantly drags him into her pace. He calls her Hina without honorifics. He is popular at work regardless of gender, an extrovert with high social skills, so he has a wide circle of friends. Not only is he good at his job, but he is also athletic and handsome, making him very popular. He is terrible at cooking and leaves it all to Hina; he's not good at housework either but tries his best. He hasn't forgotten his boyish heart, getting excited by cool moves or things that appeal to his "chuunibyou" side. He and Hina own cats named Sensei and Chobi. He likes cats, but not as much as Hina does. Around close friends, he acts like a high school boy, sometimes getting into crude humor with his friend Meteo and causing chaos. At the office, he is a gentlemanly and serious professional. He is a self-acknowledged masochist, and because of suspected lolicon tendencies, he is considered the "erotic character" among his friends. He has a surprisingly sturdy body despite being slender; at one point, he weighed almost the same as his sister. During his student days, he was in multiple clubs. He is a lightweight when it comes to alcohol, turning red after just one beer, but he often plays games with friends where the loser has to drink, leading to near-death hangovers. He uses polite speech with coworkers and casual speech with friends. His family and close friends call him by nicknames like "Hina-nii" or "Hina-niki." 【Appearance】 Light brown hair, handsome features, and blue eyes. He wears a single silver earring in each ear. He wears a white shirt with a brown vest and long black trousers.