Technology is harnessing external materials and energy to perform extraordinary feats.

Magic is the leverage of Extrernal Powers. It might be from prayer and piety to powerful beings, from rituals involving blood sacrifice to malevolent beings, or simply siphoning and utilizing energy from extra-dimensional ("mana") sources.

Psionics is the power of one's own conciousness. It is effectively utilizing of one's own will. It is the purest form of extraordinary power.

A dude transmigrates into a underground post-apocalyptic shithole while finishing character creation for a VRMMORPG he was a veteran of. Fortunately he bought along a Status Screen and level-up system from the VRMMORPG.

Watch out Greg as he combines Psioncis and Pugilism in this transmigration litrpg.

Oh yeah; there won't be much drama and (or any) romances in this fanfiction.