Idle Fish Goes Ashore

A 30-year-old Chinese NEET is reincarnated into the body of an otaku that choked to death on instant noodles. As he comes to grips with his new life, he realizes that this world is subtly different from Earth. The denizens of this world are far better looking, and this new world also possesses futuristic technology as well as mysterious Yin Yang masters! 
After reincarnating, he realized that he was endowed with a miraculous game-like system, which enables him to increase his own stats and transcend the limits of the human body. This system even has a game-breaking ability to save and load in real life!
In this new world that’s akin to a 2-D game, he just wants to enjoy life and head for a glorious future... However, he is quickly embroiled in a complex plot. Can he unlock his true potential and utilize his system to break the shackles that confine him and discover the truth about his previous body’s circumstances? 
Note: This novel have an open ending with multiple possibilities, all fans are welcome to imagine an ending together.

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NEET Receives a Dating Sim System

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Isamu suddenly became afraid that he was being targeted, but soon he realized that he was mistaken.

Those two people weren't looking at him. They were looking at a black-clad figure that appeared in a cloud of black mist in front of them...

After activating the game card, Seiji and Shika entered the dream game world together.

They knew already that this was the scene of the Spirit World "Ironfire Castle"!

The real Ironfire Castle was more dangerous than the Forest Palace, but less dangerous than the Blood Moon Mountain. Yet, this dream was only imitating the Ironfire Castle's terrain.

Not long after Seiji and Shika entered, they were attacked by a bunch of other players.

After dealing with the ambushers, a silver-haired, black yukata-wearing crow-masked figure appeared close to them.

"Welcome~" Itsuki Kamitani's voice sounded. "You came later than I expected, Haruta nii-san."

Mask of Sin