dlc1assist.rpy, around line 1830, in "Talk to Dr. Obyako". in the "else" case (already talked to the guy) a "jump dlc01_11" is missing, otherwise the talk scene plays again
(I think the assistent DLC is rushed, trying to compress the whole narrative from on-boarding to everyone's dead within one in-game day does not make a lot of sense. there's not more content needed but a more sensible time line, with "a week later" screens. give me as player a believable time frame, with the temporary MC reading the SOPs and learning about the serum and experiments - the new guy cannot give a "fresh perspective" w/o any insights into the work. spreading the story over, say, a month of in-game time ("We're currently synthesizing a new batch of the serum. The next in vivo application is planned in 4 weeks, a cancer patient in her terminal stage volunteered to become a probant." / "Here's your work laptop with all our data. Keep in mind that this device must not leave the lab. Make yourself familiar with our results and procedures and don't forget to talk to your colleagues to learn about there specific roles in out team.") would work imo better, and I'd believe the emotional bonds of the MC to his new co-workers)