Venus Mission - Moto Koroshiya de Youhei no Chuunen, Yuusha no Ansatsu wo Iraisare Isekai Tensei!

42-year-old Suzuki Takashi is a former hitman and mercenary. Although he died of cancer, he was reincarnated into another world due to his potential as an assassin. He uses the modern combat techniques he developed in his previous life, the ancient martial art Shingu-ryu and his newly acquired powerful magic to face off against the unrivaled heroes.