A Boy Who Has Been Reincarnated Twice Spends Peacefully as an S-Rank Adventurer, ~ I who was a Sage and a Hero of Previous World, Will Live in Peacefullness in the Next World~Nido Tensei Shita Shounen wa S Rank Boukensha Toshite Heion ni Sugosu-zense ga kenja de eiyuu datta boku wa raisede wa jimini ikiru,Nidoten,A Boy Who Has Been Reincarnated Twice Spends Peacefully as an S-Rank Adventurer,두 번 전생한 소년은 S랭크 모험자로서 평온하게 산다,二度転生した少年はSランク冒険者として平穏に過ごす～前世が賢者で英雄だったボクは来世では地味に生きる～