Eclipse

"It's nice to meet you, Kuroto."
The unaccented voice came from somewhere...
"Welcome to the world of Eclipse."

Eclipse is an immersive online game that links to all five body senses through special gear. Kuroto, the protagonist, has been chosen as an alpha tester to attempt to finish the game in 4 days. As he logs in to meet his NPC partner, he thinks, "I hope she's cute..."

[from DLsite English]