User blog comment:FrankieX98/The future members of the Issei's harem and peerage./@comment-36663391-20180910214520/@comment-2208155-20180912193434

Roygun and Kunou pages in dxd added information about the VOL 25.. I was right about Roygun watching TV in the bed in Hyodo Residence(vol 25) but that was during one secret reunion of Issei team.. and you should heard this about Kunou(vol 25 spoiler):

Kunou and Issei sat next to each other in the bath and told him she wants her breast to become bigger like her mother quickly and tell she’ll allow Issei to get a glanced of her breast and he better be ready for it.

Kunou is not going to grow in 2 days like you suggested.