hehehe
yes! you need to collect all the diary pages and get the true ending in the same run, once you get to the bonus room after the ending credits of the true end you can use the arcade machines along the back wall to play bonus chapters and one of them includes a small scene with eve/tate ^w^ (the amount of diary pages determines which chapters unlock, i.e 2 pages to unlock the first one, 4 pages to unlock the first and second, etc)