I tried to like this manga but the relationship is completely repulsive to me. It's built in the basis of her having power over him. Here's it's literally a superpower but the way she treats him is also like that.
@aFFi She literally pointed out everything wrong with his running form, which should greatly affect his running speed and stamina consumption. He was half-assing the first run, with a bad form to boot -no wonder why he drains stamina quickly. Assuming that he put that into mind to protect her fat ass when running for the second time, then him achieving said cutoff time shouldnt be surprising at all. Yes, him wanting to protect her ass actually has an effect -hormones works that way.