Harem System: My Choices Make me Stronger

Ash wakes up to find himself in a paralell world. In this earth, people awaken all sorts of magical powers at the age of 18. Pyrokinesis. Telekinesis. Unfortunately for ash, he has taken over the body of the weakest awakener with an F-Rank power. To make things worse, his step-sister had a S-Rank Ice talent. Luckily, he is given a powerful system that rewards him for his daring choices. The beautiful nurse, sexy teacher, school belle and all sorts of beauties begin to flock at him. Every daring choice he made gave him a reward but at a reckless cost. A man who’s already died once doesn’t flinch at the odds. He reads them, and picks the choice most likely to get him killed, or pressed up against his S-rank step-sister who hasn’t decided yet whether to freeze him or keep him. — Description from novelcodex.org