Taro-kun wa Kou Miete Igai to xxx Desu.

Alternative

Taro-kun ××× Desu; Taro-kun Looks Like This but Is Surprisingly ×××; Taro-kun Looks Like This but Is Surprisingly XXX.; Taro-kun wa Kou Miete Igai to ××× Desu; Taro-Kun xxx Desu; タローくんはこう見えて意外と×××です。