Sasuke exhaled as he gazed up at the serene, luminous moon hanging in the night sky. Qrow had found a place for the group to stay, one of his old hideouts nestled in a nearby forest. Naturally, he had to scout the area for any lurking Grimm and eliminate any threats he detected.

Activating his Eternal Rinnegan, a swirling black and purple portal materialized before him. He was at a crossroads, debating whether to inform Kakashi and the others about the strange phenomenon he had encountered, or to keep it to himself. His instincts were conflicted; a part of him urged secrecy, while his ninja intuition suggested disclosure.

'What should I do?' he pondered.

A moment later, his Dojutsu deactivated and the portal vanished as he sensed Summer's presence nearby.

Summer yawned, her eyes settling on Sasuke's back. "Couldn't sleep, Sasuke?" she asked.

"No. I wasn't tired." he replied, turning to face her. She was wearing a long silver nightgown that complemented her eyes, with red rose petals adorning its edges. Her silver and red night shoes completed the look.

Even in her nightwear, she appeared stunning to him. "You should get some rest. Tomorrow's going to be a long day." he advised.

"Oh yeah, you're starting our training, right? I'm so excited! Ruby and Yang are too." Summer paused, giving Sasuke an appraising look.

Sasuke raised an eyebrow, puzzled. "What's wrong?"

"You're handsome and all, but can you really fight?" she teased, her eyes sparkling with mischief.

Sasuke found himself amused. Wasn't eliminating countless Grimm proof enough? Or was she simply trying to provoke him?

"Do you want to spar and find out?" he challenged, his hand suggestively resting on the hilt of his Kusanagi.

A competitive gleam lit up Summer's eyes. "You're on."

She vanished in a flurry of white rose petals, reappearing fully equipped. Sasuke smirked, impressed by her speed and swift transformation. "Impressive." he acknowledged. "But don't think that will be enough to defeat me."

Summer stretched, a confident grin on her face. "We'll see about that." she responded, her eyes sharp and focused.

Without warning, she lunged at Sasuke, her scythe catching the moonlight. He effortlessly sidestepped her attack, drawing his Kusanagi in one smooth motion. Their weapons clashed, sending sparks flying.

"Not bad." Sasuke admitted, "but you'll need more than speed to beat me."

Summer giggled, her gaze steady. "Good, because I've got more tricks up my sleeve."

She spun, using the momentum to launch a series of rapid strikes. Sasuke parried each one with ease, his Sharingan predicting her every move. But Summer was relentless, her attacks growing more unpredictable and challenging to counter.

"You're improving." Sasuke noted, a hint of admiration in his voice. "But this ends now."

He unleashed a burst of chakra, forcing Summer back and making her skid to a halt. Before she could recover, he was upon her, his blade poised at her throat.

"You've got potential," Sasuke said, lowering his weapon. "But you still have much to learn."

Summer panted, her heart racing, but she couldn't help but smile. "I guess I'll just have to train harder then."

Sasuke nodded, sheathing his sword. "We'll start your training tomorrow. For now, get some rest."

Summer nodded, her excitement tempered by exhaustion. "Thanks, Sasuke. I won't let you down."

As she went back to the hideout, Sasuke watched her, deep in thought. He had made his decision. Tomorrow, he would begin training Summer, Ruby, and Yang. But for now, he would keep the phenomenon he'd experienced to himself. There were too many uncertainties, and he needed more clarity before involving the others.

Turning back to the forest, he reactivated his Eternal Rinnegan, scanning the depths of the night. There was much to prepare for, and little time to waste.