I really like this ending. I wish there was more of a solid conclusion, but i also feel like I would have had conflicting feelings about them getting together. Kyouji knows he's bad news, hes significantly older, and he met satomi when he was just a kid. For all we know he still sees Satomi as that kid. I feel like Kyouji has some feelings for Satomi, but for Satomi Kyouji is his first love and his gay awakening. All this time they could never stand on equal ground, but as he said, with this it feels like this is a starting line of them seeing each other as equals. Kyouji always paid for the meals, so in a way Satomi by paying for their dessert became an adult in Kyouji's eyes. On one hand I very much hope they at least give it a chance, but on the other I wouldn't be surprised if this is the last time they ever see eachother.
I really wish we got an epilogue farther in the future where maybe Satomi has graduated college and the boss dies.
I'm 30 and grouchy, don't be surprised
(if I post spoilers it's all lies)