Since Mitsuri, Obanai and Rengoku turned into kids, you were babysitting them when Oyakata-Sama is gone. One day you were outside with the kids and you see Obanai holding flowers to hand to Mitsuri and Rengoku is telling Obanai to get her heart

Rengoku: "Go get her Obi!" Obanai: "O-Okay!"