Snow, by Pelaam MM

Discovering more to the disappearance of his childhood friend Snow, Nolen heads his team to investigate. It includes sexually charismatic Terrian, an ex-lover, and Qamar, an empathic Aeriyan.

On the planet Ignis, they find the remains of the ship carrying Snow, but no sign of him.

Escaping a predator, Nolen falls down a shaft leading to an underground world. He finds genetically created miners and Snow, who has lost his memory.

Snow and Nolen realise their love and Nolen is determined to get them home. That means ascending the shaft protected by a Guardian, set by the Masters.

When Snow is badly hurt, Nolen goes for help, but will he be in time?