I'm a Student in the UK Who Moonlights as a Manga NPC

[Warning: This story focuses on the protagonist's career, daily life, and personal growth, with the main emphasis on his career. Romance plays a small part. If you only want to read about the top and bottom falling in love, or want to get to the romance quickly, this may not be for you.] [Warning: Mainly told in first person. If that's not for you, please take note.] [Blurb] He Xing is an ordinary Chinese student studying in the UK. Because student accommodation was too expensive, he chose to share a four-person house about two blocks from campus. The rent was half what it would have been, his roommates weren't much for talking, and there was less hassle from arguments. He thought his time studying abroad would end just as uneventfully. Until one day... Roommate A disappeared. Roommate B was brutally murdered. Roommate C was the killer. That day, the police came to his door, sealed off the crime scene, and showed up with guns at their waists and radios in their hands. At the time, He Xing knew nothing. He'd just come out of his room to get some water, and the smile on his face hadn't faded yet. His cheerful expression seemed especially out of place at a crime scene, making everyone's heart clench. The police officer stared at him sternly. "What are you smiling about?" He Xing: "...Because... because I finished today's assignment." Just then, a comment floated past He Xing's head: [What the hell, you made me laugh all of a sudden.] He Xing: ? Theme: Perhaps people meet just to prove that they still exist to one another. And in certain moments, those encounters can remind us that we have not completely strayed from our original intentions.