The TV version of episode 12 is a separate animated version, and the cartoons have been serialized one after another before, all of which were completed by the production team of Now Look at the Research.
There are indeed 26 complete animated scripts, but as a drama currently under study, the pictures of these three episodes are all found in the current study.
Therefore, these three episodes of OVA were actually specially produced for the production of "Research on Reality", and the other 23 episodes were not actually produced.