Chibi Boy and Sprout Mascot

Create a cute chibi anime-style single-panel illustration on a warm off-white paper background. The scene shows exactly two characters: on the left, a small serious chibi young man named {argument name="character name" default="a brooding black-haired boy"} with messy layered black hair, gray eyes, round wire-frame glasses, pale skin, and a slightly annoyed neutral expression; on the right, a simple white mascot creature with a round head, tiny black oval eyes, rosy pink cheeks, an open smiling mouth, and a small green sprout with two leaves growing from its head. The mascot reaches up with both arms and tugs at the boy’s shirt collar as if trying to open it, while the boy stands stiffly and resists. The boy wears an elegant all-black layered outfit: black collared shirt buttoned high, patterned black vest, dark jacket or short outer layer, black trousers, black shoes, and small gold chain accessories; keep the collar visibly closed. In his left hand he holds one oversized old black hardbound book with worn corners, gold trim, a central emblem, and a cream paper label containing Japanese-style title text resembling {argument name="book label text" default="人間取扱説明書・暫定版"}. Add exactly one speech bubble above the mascot containing the Japanese text {argument name="speech bubble text" default="閉めな"}. Use soft watercolor and ink line art, delicate shading, slightly textured paper, chibi proportions with large head and small body, a gentle beige ground shadow beneath both figures, and plenty of empty background space. Avoid extra characters, extra objects, open collar, realistic proportions, or harsh digital rendering.