I, a flat-chested girl, was reincarnated. Isn’t this a chance to have huge breasts?! I am an assassin. A flat-chested assassin who yearns for breasts and loves hot springs. I was picked up by an assassin’s organization……and had gone through tough training every day. Hence, I couldn’t recklessly go to the hot spring which I love, and the fat in my chest was lost…. It’s just a dream of dream to have huge breasts……is what I thought. But, one day. After rebelling against the organization, the last boss and I stabbed each other and died. ……I was reincarnated. I’m serious. This is my chance~ ♪ The method to attain big breasts had been researched! Alright, I will do my best to develop my boobs! I will shake my chest in a bikini~! Eeh? There’s no bikini? Then there’s still a bikini armor, right? This is the story of a former assassin traveling to seek for huge breasts, superior bikini armor and hot springs.