Dyrem
The MC literally just agreeded to the most stupid thing I've ever heard. Mc: I need compensation for risking my life Old man: well I (someone who is a principal of a highschool with questionable connections and the power of clairvoyance) cant give you anything but my daughter. Mc: Well he said he cant give me anything else so. The heck your new wife gonna do, go tell your family that you died and shes your wife. This man didnt even try.
Allow me to explain the MCs thought process for this conversation. He is first bound by the principal, told he is to be a support for heroes, and when asks for compensation, is told to marry his daughter. He obviously knows nothing of the whole situation. This leads him to his only point left other than trying to run, taking the offer. If he went along without the offer, he would be more disadvantaged. He also doesnt have to marry her at all, he just got into high school after all and has time to plan. He also knows something isnt being told, so he goes along with it in order to find out.