"S"

A character in a pink uniform with white gloves and a headband appears against a pink background, with the text "Smile Sadistic" and "Maika Sakuranomiya" displayed, followed by a character in a yellow uniform with a headband against a yellow background, with the text "Sister Imouto" and "Mafuyu Hoshikawa," then a character with long silver hair and a green outfit hanging upside down against a green background, with the text "Idol Surprise" and "Hideri Kanzaki," and finally a first-person view of a military vehicle in a war-torn street with soldiers and bodies on the ground, with the text "Capt