Eloping seems to be the best possible situation.Suicide.... i mean Souta is the one who is most miserable here.Haru is unhappy but i dont think she is unhappy enough(at least until ch.20) to the point where she would commit suicide along with Souta.She would try to convince him otherwise,if that were the case,i think.Also abt Haru's Stepfather,the story was showing him as a not a good person.But nothing happened?