colorful palette, akiyama mizuki, phenny (project sekai), project sekai, game cg, highres, official art, third-party source, 1other, ;), akiyama mizuki (cosplay), balloon, belt, blurry, bokeh, closed mouth, confetti, cosplay, depth of field, dress, earrings, frilled dress, frills, hair ribbon, happy birthday, holding, holding stuffed toy, jewelry, one eye closed, pink eyes, pink hair, pink theme, ribbon, side ponytail, sidelocks, smile, solo, star (symbol), star balloon, stuffed toy, white belt, white dress, white ribbon