Issei's OP gaming system

Misunderstanding

(In the domain)

???: So it seems the foul creature crawls closer as the light and darkness change places
(day and night cycle)

???: Well then we shall await its arrival and take out precious time ripping it apart.

???: Do not be foolish, that impudent creature grows stronger with each passing cycle, so whatever you do, DO NOT let your guard down.

???: You talk so much fire worm, well anyway I'll triple the dark knights patrol.
~~~~
(Real world)

Issei: ... I-it only happened once.

Hyuna: Huh?

Issei: Issei her sweet gaze struck deep within my soul, it was like love at first sight.

Hyuna understood what issei was trying to do so she played along. "Remember mating season is close by when it comes around we can mate all we want" Hyuna said with her poker face.

Issei: Yes yes I shall wait for that day.

Kuroka: IS THERE SOMETHING IM NOT GETTING HERE!?

Koneko: I thought you were different, all
men are really the same, PERVERT.

Kuroka being curious and upset about it checked to see if Hyuna's pheromones gave off the feeling which they didn't and Kuroka was relieved for a number of reasons.

Kuroka: Hmph your trickery won't work, your going to have to try harder than that Issei.

Issei: So you've seen throng masterful~
(Kuroka pinched his cheek)

Issei looked down and sighed "this isn't really working is it?" Kuroka looked at him and told him "Silly I fell for you because of how you are, don't try to act all cheerful, that's not you" after that Kuroka kissed him in the cheek she had pinched.

The group talked the rest of the night and later went to sleep, of course Kuroka slept in the bed Issei was sleeping, and Hyuna slept in Kuroka's room, Koneko went back to Rias's place and they all slept obviously.

(Next morning)

Upon waking up Issei felt a little heavier than usual, he knew that Kuroka wasn't on him because he fell asleep holding onto her tail like a pillow. When Issei opened his eyes he saw Hyuna laying down on his chest just looking him; they were close enough for a kiss but that wasn't the intention.

Issei calmly asked what she was doing which to responded very calmly and quickly "I'm watching my mate rest" Issei just looked at her and smiled "you hungry?" Hyuna Jumped up super exited and just as fast as she jumped up she readjusted herself back to the cold type, she didn't say anything but issei already knew she was hungry.

When Hyuna jumped Issei felt Kuroka's tail twitch, he knew as soon as that happened she woke up; issei acted as if he didn't know she was awake. So he went in a prepared Breakfast, Issei asked Kuroka to shower Hyuna which she did without hesitation. Little did Issei know Kuroka was full to the brim with questions that Hyuna could answer.

So while she helped Hyuna shower she asked away all of her questions; Hyuna answered each of the questions, but she left out the parts of the dangerous things waiting for Issei in the domain.

(Issei was done cooking breakfast)
"Come eat breakfast" Issei hollered out to the girls. Issei didn't get a response and thought nothing of it; after a couple minutes (4 minutes) Kuroka and Hyuna made their way to the kitchen where they ate and talked of all sorts of things. "Well anyways, I'll be going now, Kuroka take care of Hyuna and Hyuna please do the same with Kuroka" Issei said as he left to go to school.