姉に言われるがままに特訓をしていたら、とんでもない強さになっていた弟 raw 第01-09巻 [Ane Ni Iwareruga Mama Ni Tokkun Wo Shiteitara Tondemonai Tsuyo Sa Ni Natteita Ototo Bra Kon Ane Ni Kitaeraresugita Shimmai Boken Sha Yagate Eiyu to Nar vol 01-09]

"If you're an adventurer, it's normal to be able to do this much!"

Rose then set Shifa through a series of training exercises, telling him, "If you want to be an adventurer, you have to be able to do this!" Shifa believes Rose's words and tries his best to complete the ordeal.

However, Rose's training becomes more and more extreme in order to prevent her brother from being in danger when he becomes an adventurer....

An isekai adventure fantasy involving a boy who has become ridiculously strong after being trained by his strongest brocon sister!