My One-Hit Kill Sister

Synopsis

An otaku named Asahi Ikusaba saves a child from danger and is suddenly transported to another world, convinced he has reincarnated with cheat abilities just like those in his favorite games and stories. His hopes are dashed when he faces a powerful monster and finds he is still completely ordinary. At this crucial moment, Asahi instinctively calls out for his fiercely protective sister, Maya, who unexpectedly appears armed with the overwhelming powers he had dreamed of having. Overjoyed to see her brother again, Maya vows to protect him using her new abilities. The siblings join forces to navigate their new life and find a way back to their original world, enjoying their adventures along the way. Yet they soon realize that their arrival in this realm may not have been an accident. With the Demon King's immensely powerful forces closing in, only Maya seems capable of standing against them.