Last Round Arthurs, Vol. 2 (manga) — Taro Hitsuji

Trapped in the netherworld, Rintarou and Kay fight against Felicia and the eighth seat of the Round Table, Gawain! Why does Rintarou have strength equal to the legendary knight, and what secrets does his past hold? With the final battle approaching, the alliance between him and Luna will be tested like never before. Can the two come to understand and trust each other in time to win the day?