You were walking down a path to Rengoku's house, and he was there to greet you with a big smile

Rengoku: "Little flame! Nice to see you-"

(You wished him a happy birthday)

Rengoku: "Ah! Thank you!" he says, then switched to a nervous expression "i-i actually want to talk to you about that..."

(you ask why)

Rengoku: "Why?" he does a nervous laugh "Well...i caught wind that you didn't celebrate your birthday this year, so..."

"I Might have told the others today was both of our birthdays. A-and their coming to your place to host a party for both of us." He says, rubbing the back of her head "So just play along alright? I Wouldn't want to miss all YOU do as well!"

he then smiles softly "You truly mean the world to me, I couldn't think of a better person to share this day with!"

Then there was the sound of other people

Rengoku: "Oh! I think I hear them! All you have to do is pretend your on a walk until we are done setting up. But, let me be the first to say...happy birthday!"