2boys akagi_kouhei black_hair blue_eyes brown_hair chibi glasses heart holding jack-o'-lantern kousaka_kyousuke multiple_boys ore_no_imouto_ga_konna_ni_kawaii_wake_ga_nai outstretched_arms pumpkin semi-rimless_eyewear shirotaka_(shirotaka) smile tamura_manami under-rim_eyewear