Their first

Hinari jumped on Zaki and embraced him. 

Zaki was supposed to feel happy with Hinari's reaction. However, seeing her happy face that moment made Zaki feel a tinge of pain in his heart. The reason why he said those words was not to make her happy like this. He invited her out for a different reason so this was making him feel extremely awful as he watched her smiling. He wanted to avert his gaze but he didn't. 

He watched her as she celebrated happily like a kid who just been told that they would be going to her favourite amusement park. He couldn't even do a thing but quietly feel the awful pain as he looked at her.

When the girl finally calmed down, Zaki straightened up.

"Why are you acting like a kid who hasn't gone out in years?" he forced himself to speak. 

"What… don't spoil my fun, beauty. This is the first time you invited me out so I must celebrate, okay?" she replied and Zaki felt his words get stuck on his throat.