Oh god, my heart. These full power smiles from everyone are threatening to purify my corrupted heart.
Their not-a-date date isn't over yet, but by Kaoruko telling him she had so much fun, and that he did too makes this a qualified success as a date in my book.
Mika-chan is the MVP of this two(?) parter, giving Rintarou a lil' push to realize his growing feelings for Kaoruko. Good luck with Daiki, sweetie. I hope we see them again in later chapters.