mutsuki (moonknives), onozawa mirai, onozawa yuuki, bones (company), kinema citrus, tokyo magnitude 8.0, bad id, bad pixiv id, 00s, 1boy, 1girl, age difference, bag, ball, blouse, blue eyes, bow, brother and sister, brown eyes, brown hair, green shirt, holding, holding bag, holding hands, kneehighs, open mouth, outdoors, school uniform, serafuku, shirt, short hair, shorts, siblings, skirt, smile, soccer ball, socks, teenage girl and younger boy, walking, white shirt