2boys, bara, bare_tree, colored_pencil_(medium), completely_nude, couple, dagou_(yuzhou_fei_gou), faceless, faceless_male, from_above, looking_at_another, male_focus, multiple_boys, nude, original, red_nose, reflection, reflective_water, short_hair, swimming, traditional_media, tree, weibo_logo, weibo_username, winter, yaoi