How many seasons does Research Now have * * *, how about OVA?

Yan has made two seasons, or rather, the second season is an unfair draw. It was originally an animated film watched by the protagonist of Yan (Modern Visual Phenomenon Research Association). After Yan's TV, three episodes of 1, 2 1 and 25 were made in the form of OVA. In the original design, Unfair Draw was a 26-episode animation, and OVA extracted 3 episodes from it to make it. At that time, there was no TV drama version of Unfair Lottery, so these three sentences were made according to the relevant settings in Now Look at Research, so the plot was not continuous. Later, due to the popularity of unfair lottery, the producer decided to make all 26 episodes in the form of TV version, and now there is a new TV version.