I Trade My Life for My Strength

An unexpected encounter gave me the strongest power. Money and power are readily available, but the price is... Your own life? Time is fair, everyone has 86,400 seconds in a day. Time is also eccentric. In the same time, life is very different. "To gain the ability to overdraw your life, Tokikawa, what do you want in exchange?" "... I haven't thought about it yet, let's burn it to our heart's content first."