Soon, the seaside trip came to an end.
After three days of play, everyone had enjoyed themselves to the fullest.
Afterward, the group returned to the Underworld.
After the vacation, Rias's peerage would return to the Underworld to receive their education.
For instance, Kiba Yuto's master was Okita Souji.
Upon returning to the Underworld, he would study swordsmanship with Okita Souji.
"Yo-ho, welcome back, Sona-chan!"
Just as they stepped off the Underworld train, Serafall pounced toward them.
She rubbed against Sona's cheek with a face full of joy, causing her glasses to tilt slightly.
"Onee-sama!"
Being watched by so many people while Serafall, dressed in a pink Magical Girl outfit, rubbed against her made Sona feel a surge of shame.
"Hey, your big sister is right here!"
Serafall said with a grin.
"Let go of me."
Sona pushed her face away, wearing an expression of disdain.
Though she looked disgusted, it was clear she was actually quite flustered.
It seemed she wanted to be close to her sister but was too embarrassed, which led her to make such a face.
In truth, she was also happy about Serafall's intimacy.
Could this be considered tsundere?
When she finally managed to get Serafall to leave her alone, Sona looked dissatisfied, but she was actually quite disappointed inside.
When they were children, they were always stuck together.
Unfortunately, they had grown up and developed a bunch of useless sense of shame.
"So this is the Rias from the parallel world."
Serafall looked at Rias with curiosity.
What responded to her was a spine-chilling smile.
"Ugh, I feel like that look in her eyes is so scary, just like an enemy of a Magical Girl."
Serafall said as she broke out in goosebumps.
"How could that be? I'm a partner to Magical Girls."
Rias shrugged.
"Is that so?"
Serafall was somewhat suspicious.
She was a Satan, and her senses were very sharp.
To make her feel such a chill, Rias must have been thinking about something terrifying just now, which her senses had captured.
If she was a partner to Magical Girls, was she something like Kyubey?
"By the way, I really want to know what the parallel world version of me is like. Does she also like Magical Girls?"
Serafall ignored the previous feeling and spoke excitedly.
People with such a carefree nature were like this; as long as it wasn't serious business, Rias herself was a trustworthy 'insider.'
Since that was the case, she wouldn't care too much about the state of their daily interactions.
"Regarding liking Magical Girls, I can't say it's exactly the same, but it's similar,"
Rias said. "After all, there are many differences between the works of the two worlds, and with cultural exchange from Other Worlds, preferences in this area will also be biased."
Hearing this, Serafall's eyes lit up as she asked, "Little Rias, can you get Magical Girl works that are different from this world?"
"I can."
Rias chuckled. "We can watch them together when we have time."
"Yay!"
Although she felt something was slightly off, the premonition wasn't strong and only lasted for an instant.
So, Serafall dismissed the premonition as an illusion.
"Wait, did you just mention a Other World?!"
Sona suddenly asked.
"Oh right, Other Worlds shouldn't have been confirmed yet," Serafall realized and said. "Furthermore, the Great Red guards the Dimensional Gap, so even if Other Worlds really exist, it's impossible to interact with them."
"They do exist. After all, I have personally been to a Other World."
Rias shrugged. "As for the Great Red, He has gone missing."
"I see. It seems there are huge differences between the two worlds."
Serafall nodded.
It should be said that the source of the greatest difference in that world was Rias herself.
Rias, who had crossed through time and space, was essentially a hint, yet no one had noticed it.
After the Rias of this world said goodbye to Sona, the two headed toward the Sitri and Gremory territories respectively.
There was still some time left in the vacation; it was estimated that after a while, the Rias and Sona of this world would choose to break their engagements.
Sona's fiancé was a loser, and the third young master of the phenex family would definitely not be a match for a Ultimate-Class Devil; the outcome was already set in stone.
After meeting Sirzechs and the parents of this world's Rias, Rias began training with Ingvild.
After sleeping for a hundred years, Ingvild's body contained extremely deep magic power; as long as she learned to manipulate magic power and her Sacred Gear, her strength would steadily increase.
One could say she was born standing at the peak.
"Hard work today as well."
The day's training ended, and Rias looked at Ingvild, whose face was dotted with sweat.
"No, you're the one who worked hard."
Ingvild gave a faint smile. "Thank you for always training with me."
Compared to sparring with the Rias of this world, training with Ingvild was much easier.
Mainly, seeing her other self so weak, she couldn't help but train her a bit.
"Then how are you going to thank me?"
Rias smiled, then leaned her left cheek forward.
Looking at Rias's direct gaze, a slight blush appeared on Ingvild's face.
During this time, Rias had been far too intimate with her.
Especially when bathing, using various excuses to help her clean private areas, resulting in the naive her being toyed with severely.
That completely exposed desire made her like a fish caught on a hook, unable to escape at all.
And after a long time, she actually found herself enjoying the intimacy with Rias.
Looking at Rias's cheek, glamorous and full of charm, she simply couldn't hold back.
Her heart was thumping; she admitted, she was moved.
Lightly kissing Rias's cheek, Ingvild shyly asked, "Is this enough?"
Waking her up, always helping her integrate into this world, helping her train—
It could be said that the void in her heart was completely filled by Rias.
"One more time?"
Rias turned her face, showing her right cheek.
With a 'mwah' sound, after the light touch and before Ingvild could react, Rias cupped her cheeks and leaned in close.
No longer lips to cheek; under Ingvild's dazed gaze, Rias's lips met hers.
A tongue as agile as an eel pried open her teeth and then roamed freely.
The powerful aggression made it hard for Ingvild to withstand.
She was the type who wouldn't really resist, so in this situation, she could only respond clumsily and slightly.
Not proactive, but not refusing either.
After a long time, the two slowly separated.
Looking at Ingvild's expression—pure yet infatuated, but also a bit confused—Rias chuckled.
Licking her lips, Rias swallowed her saliva and bit her ear, saying, "You did well."
But... without much of a response, was she still confused?
Rias thought to herself.
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