1boy, armpit_crease, arms_behind_back, blue_eyes, blue_male_swimwear, blue_swim_trunks, blurry, blurry_background, blush, collarbone, cowboy_shot, eyelashes, hair_between_eyes, hair_ornament, hairclip, holding, holding_innertube, innertube, kaneshiro_matoi, leaning_back, looking_at_viewer, male_focus, male_swimwear, manana_(matoi1111), medium_hair, navel, nipples, original, otoko_no_ko, palm_tree, pink_hair, pool, poolside, puffy_nipples, sidelocks, solo, speech_bubble, stomach, topless_male, tree, water_slide