Ｓ ｓ

エス

硫黄 昭和・1 Ｍ・2 主語

sulfur S s south sadist sadistic sister female partner in a homosexual relationship nth year in the Shōwa era (1926.12.25-1989.1.7) small second subject (grammar) S rank (usu. top rank on a SABCDEF scale) S grade best class

S s (neunzehnter Buchstabe des Alphabets)

likely from スーパー or スペシャル