Issei's OP gaming system

The sisters choice

Issei: Well the thing is, I just arrived at the underworld, and I heard a loud explosion so...

Kuroka: You followed it here.

Issei: Yes

Kuroka: Hmm I understand now. So first things first, we should leave this place quickly, the devils will be arriving at any time now.

Issei: ok but why~

Kuroka: They'll kill us or take us in for the murder of high ranking Devil, and with no evidence to prove our innocence, we'll spend the rest of our time in jail or we'll get executed...

Issei: You know for some reason I wanna tag along with you, but I gotta stay here.

Kuroka: You killed him, I merely attacked him and gave him lethal injuries, if you wanna stay then...

Issei: You know what I'm going to tag along with y'all after all, so anywhere you might be headed too?

Kuroka: No. We don't have a place to go to at all. at this point, we're just trying to flee and not get captured.

Issei: then come with me to my place, it's nothing much but at least you won't have to stay outside.

Issei, Kuroka, and Koneko left with issei to the upper world, Issei was able to connect his magic circle to his last location pretty easily...

When Issei and the other 2 got to his place, Issei noticed that both girls had tattered clothing. And didn't look well fed. "Hey you two I'm going to go get some things, you both may use the shower for however long you may want," issei said as he opened the door to go outside. Both Kuroka and Koneko were nervous and uncertain at first, but they felt no malicious intent coming from issei, so after a couple of minutes, they both hopped into the steaming warm shower.

"God what's wrong with me, I just met these girls and I invited them into my house and I'm getting them clothing and food now. Well I guess, they remind me of my relationship with my sister, I want these 2 to never get separated" issei thought to himself as he arrived at a clothing shop.

Issei bought the girls different types of clothing both in size and color. After issei had gotten them clothing, he went to the convenience store to buy supplies such as food and towels. When Issei arrived back home he opened and closed the door and set the bags of food down on the kitchen counter. Issei then went and set down the change of clothes with the towels for the girls who were still in the shower. "Hey, umm I set a change of clothing with some towels on the floor for the both of you." Said Issei as he made his way back downstairs into the kitchen.

Issei started to cook what he could manage to do "Ahh they're gonna hate this" issei said "Hate what?" Kuroka said as she popped up around the corner.

Issei: Hehe, the food, I'm not much of a cook, I haven't ever tried it and stuff so I can't guarantee anything too good or good at all.

"Wow, it smells super good!" Koneko said very loudly as she ran downstairs.

Kuroka: Koneko, don't run in here, it's disrespectful.

Koneko: Awwww I'm sorry big sister.

Kuroka: I'm not mad at you, it's just...

Issei: Oh let it go, it's fine she can run and make as much noise as she wants.

Koneko: For real!

Issei: most certainly...

[ 1 month later]

Over the time of this month, issei was training and leveling up as much as he could while spending time with Kuroka and Koneko.
Kuroka felt as if they had stayed too long at issei's house and were taking advantage of his kindness that way. Koneko was as happy, the happiest she had ever been in her life...