4girls, ai-chan's_sister_(tawawa), ai-chan_(tawawa), blue_theme, bouncing_breasts, bra, breasts, cellphone, cup, double_entendre, faceless, faceless_female, fanged_bangs, getsuyoubi_no_tawawa, heart, himura_kiseki, huge_breasts, large_breasts, misunderstanding, multiple_girls, necktie, one_eye_closed, open_mouth, phone, pleated_skirt, popped_button, short_hair, short_twintails, siblings, sisters, skirt, smartphone, surprised, sweatdrop, teacup, teeth, twintails, underwear, volley-bu-chan_(tawawa)