( Yuuki's POV )
I was interested in the idea of fighting Tannin, but he was here to help train the young devils, and that took priority.
Tannin: oh It seems the time has come to act.
A magic circle appeared above us and Rias's peerage, minus Rias, fell into the canyon in front of us, Tannin appeared before the young devils acting like a wild dragon and the battle began.
Without Rias by their side, Akeno took the lead, His orders were appropriate, and taking into account the strength of the young devils and thanks to my training, their powers were sufficient to harm Tannin, It was only minor scratches, but doing that to a dragon as old as Tannin was an achievement.
Despite that, all the efforts of the young devils were going to amount to nothing; Koneko, who was a level above the young devils, was the only one who realized the difference between their powers, Also, when she activated her Touki, she noticed my presence with her heightened senses.
I waved to her and she immediately understood what was happening, but she played along with Tannin, the young devils held their ground but they were running out of energy quickly.
At that moment, Rias appeared beside me, and after watching the battle, she decided it was time to stop it.
Rias: That's enough.
Upon hearing Rias's voice, Tannin immediately stopped his act. The three of us jumped in front of the dragon, and all the young devils, except Koneko, looked at us in surprise.
Issei: President! Sensei! What's going on?
Akeno: Oh my, is this another one of your sudden tests, Sensei?
Yuuki: Don't blame me... This time.
Azazel: This is my job this time, I wanted to know how you perform against a powerful enemy. Yuuki laid a good foundation for you, but you still lack raw power.
Yuuki: They will get there, I have no doubt in my mind that in time they will be among the most powerful high-class demons.
Azazel: Time is what we don't have much of; with the threat of the Khaos Brigade and the dangers outside our world, they need to move quickly.
Yuuki: I will leave them in the capable hands of Tannin and you.
Kiba: You won't be staying, Sensei?
Yuuki: There are matters that need my attention, but I'll be keeping an eye on you.
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I left Rias's group to their training and returned to our new base in the underworld. Yasaka told me that she was going to go with Koneko to help with her training.
I quickly left the mansion because I had to check in with Sona's group, and when I opened a portal, Sakura approached, saying she would accompany me. I had no problem with that.
Upon arriving in front of the Sitri family mansion, a maid appeared and guided us inside. It turned out that Sona's group, instead of training, were having a family meal, that was because Serafall was visiting the mansion; it was an unusual event, and they didn't want to waste it.
I was expecting a somewhat formal and serious dinner, considering Sona's personality and the stature of her family, but when we entered the dining room the atmosphere was very casual and Sona's parents were very friendly.
Lady Sitri: Oh, Sensei, it's a pleasure to finally meet you. Please have a seat. Oh, is it alright if we call you Sensei?
Yuuki: That's fine with me.
Lord Sitri: We wanted to meet the man our daughter holds in such high esteem.
There were already empty seats for us near the head of the table where Sona and her parents were sitting, and I was somewhat embarrassed by her words.
Yuuki: You give me a lot of credit.
Lady Sitri: Nonsense, you have given a lot of support to three great families of devils, especially the Phenex family.
The conversation at the table was mostly Sona's mother asking me questions, something you would expect from a mother, but then she said something that surprised everyone.
Lady Sitri: Sensei, you wouldn't like to take my Sona as one of your wives.
*Slam*
Sona: Mother!!
When her mother was practically giving her away, Sona slammed her hands on the table and yelled at her mother. I looked at Sona; there was no indignation or repulsion on her face, she was blushing intensely and she was stealing glances at me, but she couldn't look me straight in the eye.
Then I looked at the mother who was completely serious.
Yuuki: Sona is someone important to me, but I see her more as a little sister.
Lady Sitri: oh You want to be Sona's brother, so you're after Serafall, I see, she's been curious about Sona's sensei these days.
I looked at Serafall and she quickly looked away; she wasn't rejecting what her mother was saying either. I think even demon kings have difficulty going against their mother.
Yuuki: It wouldn't be complicated for a demon queen to enter into a relationship with someone outside the devil hierarchy, and someone who has multiple wives.
Lady Sitri: I don't think there are many who share that feeling, and even if they did, they wouldn't have the power to act, You are the teacher of the Red Emperor, who defeated the White Emperor and faced the dragon Ouroboros without hesitation, the truth is, many families would be happy the more ties you have with the underworld.
Yuuki: So that's what this is all about?
Lady Sitri: Please don't misunderstand, I'm just looking out for my little girls, I wouldn't say these things to just any strong person who walks through our doors.