MTL - Did You See My Husband - Chapter 4 didn't see 4

[Warning: Mature][R18+]What happens when a normal office worker is reincarnated into a brand new world.Option [A]: Instant riches, wealthy life?Option [B]: Gain childhood sweet heart? Instant romantic adventure?Option [C]: Dragged into political battles between his new siblings in a noble household?After losing his life to a yandere's obsession, Adrian awakens in a new bizarre world, a brutal, yet strange landscape overrun by breathtakingly powerful supernatural women. From elegant elven women to stunning demonesses, these breathtaking beings are unable to bear male children of their own, making human men the most coveted, and hunted resource.Fortunately for Adrian, he wasn't stranded without a helping hand. Gaining an unbelievable ability after his transmigration, he now tries his best to survive and adapt in this new world.Notice: This book won't feature Yaoi, but it has R18+, Mature, Survival, Romance, Magic, e.t.cRecommended for both male and female readers.discord server link: https://discord.gg/sNqHEHTR

The mortal body, metamorphosis, longevity, immortality, and eternal life. These five realms, step by step, reveal themselves in front of you. As a normal person, how can one try step by step to reach and open the door to eternal life?

Between the heaven and the earth lies the mortal body, the mysteries of metamorphosis, freedom of longevity, the power of immortality, and the hope of eternal life. A story filled with endless new magic, a new world of immortal styles, people, demons, gods, fairies, magic, kings and emperors. A world of love and hatred, revenge, and mystical battle, all in “Eternal Life.”

- Description from Novelupdates

A world where awakened individuals with special powers emerge due to a system. At the New Spring Kindergarten infant class, Gru awakens as an S-rank Hunter at the age of 4. Along with this, there is a quest assigned to her… [Quest: A child needs a strong guardian!] Why is a guardian needed? That is because Gru has no mother or father. Gru, who had no family, is adopted by the greatest Hunter in South Korea after many twists and turns, and along with that, new skills are developed… [Let’s try registering a new guardian in the slot!] [Children can earn ‘filial piety points’ through various activities, which can be used in different areas.] Gathering guardians enables faster growth? ‘That’s amazing!’ Alright, I’ll gather all the S-rank guardians!

Our protagonist Caam is a man from Earth that was reincarnated into this world as a demon. In order to survive, he spared no effort in avoiding the sparks of battle and without noticing it, he became strong himself.