yukko (matakite 4kaku), tenma saki, tenma tsukasa, project sekai, commentary request, highres, official art, second-party source, translation request, 1boy, 1girl, anniversary, artist name, blonde hair, blue sweater vest, book, brown pants, collared shirt, copyright notice, flower, gradient hair, guest art, holding, holding book, logo, multicolored hair, orange eyes, orange flower, orange hair, pants, pink hair, reflection, shirt, siblings, solo focus, sweater vest, white shirt