It wouldn't be an understatement to say that Hajime was terribly embarrassed by the entire situation. Not only did he lose his mind in the middle of one of the most crowded parks in the country, but he also had to show that side of him to Megumi, who didn't even tease him for it.
Once Hajime got back to his senses, the thought of Megumi harassing him to no end about that shameful situation plagued his mind. However, Megumi didn't show any of her usual arrogance nor did she look down on Hajime. Instead, she handed him a bottle of water so he'd manage to ease down.
One too many reassurances later, Hajime convinced Megumi to join her group as he rejoin his group. Megumi, who was gravely worried that Hajime's condition would relapse, made sure that Hajime would really go back to his group safely and so she gave him her number. "I can't believe it took this long for me to give you my number. At least text me, okay?" Megumi said.