MTL - I Heard that My Fiance is Super Fierce - ~ Chapter 28

Step into a world where science meets the unknown, where mechas clash in brutal duels, and where every Biocore holds a mystery waiting to be unraveled.Follow Nioh, a genius weapons designer, as he uncovers lost technology, battles biomechanical titans, and pushes the limits of power, in an intergalactic thrilling adventure

"There is a thin line between poison and medicine, and I shall make you dance on it!"

An ordinary (?) grandfather, Choi Chuntaek. In an effort to protect his granddaughter, he started the virtual reality game 'Arkstar.'

Then... he accidentally obtained a legendary class?

To save someone, a poor boy unexpectedly acquired Dragon Blood as a body fortifier and even slept with a beautiful female CEO. By a twist of fate, he became the bodyguard of this female CEO, thus beginning a journey of an incredible turnaround.Female CEO, “Come to my room tonight to discuss work.”Long Fei, “Are you trying to kill me? Discussing work every single day for a month, can't you give me a break?”