Marriage contract: Genius baby's belly daddy - Chapter 18

One day, Zhang Fan, a poor medical student, receives a medical system from the future. This turns him into a new shining star in the medical field. Along the way, he must face medical corruption, competition, and infighting from other doctors, and even find time for a love life as he strives for the top of the medical field!

- Description from Novelupdates

Jacob Steve, an Old Man, died at 116 after living a whole life.

But Jacob always had a dark side, which he always suppressed and hid from others.
However, in the later years of his life, when death was inevitable, he understood there wasn't any point in having wealth, knowledge, or desires if you couldn't have a life to enjoy them.

He became obsessed with fabled immortality and devoted his reaming life to extending his fleeting lifespan, but just like any other failed.

However, he mysteriously got another chance at life and found a way that led to fabled immortality.
But he was also forewarned that the way led to it was filled with blood and darkness!

In the end, Jacob chose it anyway with no way of going back, and it was also the start of his suffering and his icky, brutal journey toward the 'Immortality' he wanted so badly!

A biker tries to save a cat on the highway and gets hit by a truck (Truck-Kun), he was rushed to the hospital but, due to internal bleeding, he dies only to be reborn as a cat, in a new world with a system.

In this new and vast world, he tries his best to get used to his new body and get stronger along the way. With his overpowered system and skills. To one day become untouchable.

Sa gitna ng kabundukang binabalot ng misteryo, lumaki si Esmeralda, isang dalagang manunugis na may kakaibang lakas at talas ng pakiramdam, sa kalinga ni Ismael— isang albularyong umampon sa kanya dalawang dekada na ang nakalilipas. Ngunit sa kabila nito, nakatago ang isang katotohanang unti-unting mabubunyag— ang lihim ng kanyang pinagmulan na bumabagtas sa hangganan ng tao at mundo ng kakaibang elemento.Sa pagbabalik nila sa baryo ng kanyang lolo, harapin ni Esmeralda, hindi lamang ang sigalot sa pagitan ng kinalakhang pamilya, kun 'di pati na rin ang mga lihim ng kanyang pagkatao. Sa gitna ng pamilyar na tanawin ng baryo, magtatagpo ang landas nila ng mga taong magiging parte ng buhay niya— mayroong magiging gabay sa kaniyang pagtuklas at may iilan namang magdudulot ng kapahamakan at kalituhan sa kaniyang paghahanap ng kasagutan.Sino ba talaga siya? At ano ang pinagmulan niya?Ngunit sa bawat hakbang niya patungo sa pagtuklas ng katotohanan, lalong lalalim ang ugnayan niya sa mga anino ng mga nilalang na walang ibang nais kun 'di ang kaniyang pagkawasak. Sa bawat mutyang mahahawakan ni Esmeralda, sisigaw ang nakaraan— at sa bawat sigaw nito, unti-unting mabubuo ang kwento ng isang salinlahing nababalot ng hiwaga na siyang uukit at huhubog sa kaniyang pagkatao.