I just saw chap 26 raws and it's coming what everyone or some were asking 3some. Tho sad to say this manga came to its end in chapter 27. And It seems she went back to the future
Looks like i need to prepare my heart for this. T_T
Maybe she will go back to past when she remember what she did to younger seto, it seems like she lost her memories or it is only a dream. But id like to see adult seto and nanasawa doing some action haha