Sounds like a baker's competition for a high school anime. I hope you have fun! lol XP
Homophily (i.e., "love of the same") is the tendency of individuals to associate and bond with similar others, as in the proverb "birds of a feather flock together". The presence of homophily has been discovered in a vast array of network studies.
In World War 2, you could help to hide Jews in a sort of sewer. The Government keeps tracks of most Jews, yet you could attempt to hide people, or at least give water, food, or a safe place. It may bring yourself to death back then, yet it would have a possibility to save at least some Jews.