1boy, 1girl, 2018, blue_hair, blush, brown_hair, closed_mouth, collar_x_malice, dated, eye_contact, face-to-face, green_eyes, happy_birthday, hetero, hoshino_ichika_(collar_x_malice), light_blue_hair, long_hair, looking_at_another, mumin, open_mouth, red_eyes, sasazuka_takeru, short_hair