Lucifer and the Biscuit Hammer (2022)

S1E2 Amamiya Yuuhi and Asahina Samidare

Yuuhi discovers the motivation behind Samidare's desire to annihilate the Earth, prompting him to train diligently each day to sharpen his newfound abilities. Yet, the "discipline" instilled by his grandfather remains a heavy burden, feeling like shackles. Amidst this struggle, Yuuhi learns that his grandfather has taken a turn for the worse and is now in the hospital, adding to his worries.