More than Beyond the Skies of Finality [Honkai Series X Transformers FT; HSR]

When an alien race of a Sapient, techno-organic species, broken by a severe Eon-long war that forced them to flee to the stars, led them to Earth, a planet that became the battlefield of a malicious extraterrestrial alien threat known as the Honkai... They too were affected, and crashed to the place with most of these strange aliens... And these seasoned warriors now have to go to school... and cute girls fight inside of giant alien mecha...