Death March to the Parallel World Rhapsody

Suzuki Ichirou, a programmer aged 29, is unexpectedly transported into a fantasy RPG where he assumes the identity of Satou, a 15-year-old. Despite thinking it's a dream, he quickly realizes the experiences are genuine. Following his deployment of a special ability known as meteor shower, which may be used only thrice, he obliterates an entire army of lizardmen and ascends to a high level. To avoid drawing attention to himself, he hides his level and intends to lead a peaceful life whilst interacting with new characters. However, unexpected occurrences such as the resurgence of a demon king may disrupt his plans.