Four Childhood Friends are NTR-ed by the Hero ... Huh, One of Them is Fine?

Summary:

A young boy named Aleph followed his four childhood friends from his village when they join the hero's party. The girls from his childhood say they love Aleph, and he even promises to marry one of them. However, the story picks up six months later -- there is Aleph, hated by his childhood friends like filth, and the hero Hayato, who is shown love just like the Aleph once was... This is a revenge story about Aleph, who is made to carry luggage and looked down upon by the hero and his childhood friends, betrayed by everyone, fueled by hatred, and gets revenge on everyone. But it's not quite that... it's a story about ...