Only a couple months into his own future, after being evicted from his apartment. He only has a short period of walking the streets before he is attacked by a vampire named Xiaomei, transformed into one, and left to wake up on his own in an unfamiliar hotel with no clue as to what he had become. Shortly afterwards he found a couple and let his confusion and bloodlust get the better of him, attacking the man, but not killing him. Frightened by his own actions he ran to find a hiding space in an alleyway as he crouched, covered in a strangers blood, and trying to understand what was happening to him.

The first 12 comments of this thread cover the rest of time up to his new, updated canon point (please don't mind the comm name, the thread is clean). The basic summary is a vampire named Jaehyun finds Junseo and takes him back to his windowless warehouse, and tells Junseo that it is his new home.

Junseo comes from the moment before Jaehyun drops the "V" bomb, and would be arriving back in the game confused and still covered in blood.

His personality will not change much, but he will be severely shaken up by the event, and more nervous and less trusting than he was prior to the canon update.

Power Update:

Vampirism: This umbrella includes heightened senses, increased speed, strength, and durability. The need to drink human blood to remain functional. A noticeable lack of a heartbeat. Very fast healing, and near invulnerability (but if someone really wanted to take him out they could completely devour his body. It would taste horrific, but it'd keep him from immediately regenerating). Glamouring... technically... Junseo tends to melt people's minds with attempts, so while the power is technically glamouring it should be called "horrible death" in his case (he will not be using it). The inability to enter buildings considered homes or dwellings without an invitation first. Invitations later rescinded while Junseo is in the residency will cause him to bleed from every open hole in his body until he is nothing but a puddle of blood and ash on the floor. Coincidentally, he would have that problem when stepping into sunlight as well, except...

Invulnerability to the Sun: A power literally everyone else in the world already has. Sunlight will not negatively affect Junseo, despite his vampire nature.