Shin no Jitsuryoku wo Kakushiteiru to Omowareteru Seireishi, Jitsuwa Itsumo Meccha Honki de Tatakattemasu

Roak Aleas, a second-year at Utrea Academy, is ranked second among his class of Spirit Mages—yet he has never once called upon a contracted spirit. While his peers assume he's hiding his true strength, Roak is actually fighting at full power every single time, using a secret method to battle threats without summoning.