Ninja Endurance Training (Pixiv Fanbox)

Konohamaru is showing Naruto an endurance training exercise that Pervy sensei taught him. It has quite a simple goal: last as long as you can without cumming! Much to the Genin's humiliation, Naruto is far worse at this exercise than Konohamaru is. The blond ninja is beyond humiliated as he explodes within 30 seconds from the fleshlight's slick pumping. Konohamaru laughs and calls him pathetic, even he lasted longer than that! Looks like they'll have to spend all day training Naruto's endurance, lest he gains a reputation for being a weak-dicked loser ^^