Mecha Pilot: the Light-Breaking Boy

(Half mecha, half daily life, don't read if you don't like it) (Single female protagonist + future mecha + unknown force) Jiang Huaiyu traveled to a parallel world and worked hard step by step from an orphan in a slum to become a mecha pilot that everyone respected. However, looking back on the past, he discovered that there were still many troubles waiting for him - the abnormal state of his adopted sister Jiang Xingyun; the many reunions with the girl; the return of the mysterious organization that had a deep blood feud with him, and there seemed to be a terrifying backer behind it... Can he escape from these troubles and take revenge...