Am I in Another Love Triangle Today?

This is a gong-centric story. The gong is Xue Tingyuan. The shou has already been decided. This isn't a reader-voting story. Blurb: [If I could do it all over again, I'd kick the System ten thousand times!] Xue Tingyuan is an alpha. The top-ranking powerhouse in the future ABO world. But a meteor shower leads a foolish System in another dimension to mistake him for its Host and bring him to an unfamiliar, ordinary modern world. The System calls itself the Shura Field System 023. Since it has already mistaken him for its Host and brought him here, it has no choice but to improvise. The System promises that if Xue Tingyuan perfectly completes the Shura Field missions in four different worlds, he'll be able to go home and won't remember any of it. But then, because of a dimensional accident caused by the System's own improper handling, the four worlds, each with a different setting, plot, and characterization, unexpectedly merge into one. System: "Ah... Ahaha, it's fine! I can make a schedule for my Host! We'll go to school as usual Monday, Tuesday, and Wednesday! But then you'll have to work at the company at night, and shoot a drama on Thursday, Friday, and Saturday... Sunday..." Xue Tingyuan: ... (pinches the spot between his nose and lip) Please note: Gong-centric! The gong is Xue Tingyuan. The gong is an alpha with pheromones. Their scent is a secret for now. There are four kinds of worlds with Shura Field missions: school, substitute, entertainment industry, and ABO. The first three worlds each have their original canon pairing, but in the last world, the gong is one half of the original pairing, and someone else is the one trying to start a Shura Field with him. Enjoy! Theme: Work hard