I am looking the title of this isekai manga, where a whole school bus (I think) full of students were suddenly transported into another world, and all of them were being analyzed and had their power capabilities estimated, or the specific amount of their power capabilities, one by one.
The main character's power is 2 (literally), while two of his girl friends got above average and higher amount of power and the two of them are the highest recorded among the students. All of his classmates and the other world people were laughing at him. The two girls who got the higher score did not like the actions of their classmates towards the MC.
Then other world people declared that he will become a slave because in their kingdom, the people who have the lowest amount of power recorded will become slaves or be disregarded by the people in the land, while the person who is above average or higher will be treated nicely. Because of his power and the weakest among the students.