Timepiece Lifestring

Xia Sen mistakenly entered the realm opened by gods in a math class and accidentally obtained the ability called "Clock", which can accelerate for 3 seconds or pause time for 3 seconds, but the price is that it can only be used four times. If he wants to use it again, he must give up one-eighth of his lifespan to the gods. In addition, the gods also asked Xia Sen to use this ability to solve the [crisis] that occurred on the planet, which is the Blue Star. It is said that this can be done once to increase the life span of a random year. Xia Sen tasted the benefits when he paused time for the first time, and it became more and more uncontrollable after that, so he agreed to the god. At the same time, on the other side of the country, a young man who had just received a critical illness notice took the first step towards the abyss on the roof of his house. However, before that step was completely taken, a voice stopped him. "Do you really want to die?" "Then what else can be done? There are only 3 months left." "Do you want to make a deal? I'll give you power and you'll do things for me?" "What power? Besides, why me?" "Because..." "You are the chosen one."