The Hero Is Overpowered But Overly Cautious, Vol. 5 (manga)

In order to learn Valkyrie''s ultimate abilities, the Techniques of Destruction, Seiya has begun training with her, but the way they--re going about it has Rista more than a little flustered! Whispering --I--ve...never felt this way before--...while in bed...naked in each other--s arms--hold on, how the hell is this supposed to be training?!?!?!?!?!?!