Kosu and the team were completely exhausted from their battles against the Alpha Monsters and the Black Sun soldiers. As they moved deeper into the dungeon, they knew they had to be cautious to avoid any further confrontations. Luckily, the icicle tribe had given them a map of the dungeon, which highlighted the safe passages and routes to avoid the Black Sun's ambush.

They carefully followed the map, moving silently and quickly to avoid detection. The ice walls seemed to close in on them as they journeyed deeper, their breaths visible in the frigid air. It was a maze of twisting tunnels and jagged crystals that glinted in the dim light of their torches.

The team moved with stealth, constantly on the lookout for any danger. At one point, they heard the sound of footsteps echoing in the distance. They quickly extinguished their torches and hid behind a large boulder, hoping to remain undetected.

As the footsteps grew louder, they heard the voices of Black Sun soldiers. They could hear them talking about the team and how they had escaped their ambush earlier. Kosu knew they had to act fast, or they would be caught.

He whispered to his team, "We have to move now before they find us. Stay low, stay quiet, and follow me."

The team silently followed Kosu, who skillfully led them through a series of twists and turns, avoiding the patrolling soldiers. They could see the exit up ahead, but it was guarded by two heavily armed Black Sun soldiers.

The team knew they had to fight their way out. Sakura and Ryota attacked the soldiers with their magic and swords, while Kosu focused his energy on their weak spots. The fight was intense, but the team prevailed, and the soldiers were defeated.

As they were about to leave the icicle dungeon and make their way back to the city, they suddenly heard a voice behind them.

"Well, well, well, what do we have here?" Dr. Kuro emerged from the shadows, a sly smirk on his face as he eyed the separation grass in Kosu's hand. "It looks like you've found what you were looking for. How fortunate for me."

With a swift movement, Dr.Kuro take the bag from Kosu, who is so tattered after many battles. Kosu tensed "What do you want, Kuro? Give us back the grass."

Dr. Kuro chuckled. "Oh, I don't want anything from you, my dear boy. I already have what I need." He gestured to the backpack slung over his shoulder, which appeared to be filled to the brim with various herbs and potions.

Sakura stepped forward, her hand on her sword. "You stole that from us, didn't you? You knew we needed that grass to cure Jinpei."

Dr. Kuro shrugged. "Perhaps. But you should know by now that in the world of dungeon exploration, anything goes. And besides, I'm not the only one who's interested in your little friend's condition." He flashed a sinister grin. "There are others out there who would pay top coin for a rare, mystical grass like this."

Ryota stepped forward, his eyes narrowing. "You wouldn't dare sell that grass to anyone. You know what could happen if Jinpei doesn't get cured."

Dr. Kuro's grin widened. "Oh, I wouldn't sell it to just anyone. Only to the highest bidder." He turned to leave, backpack still slung over his shoulder. "Well, it's been lovely catching up with you all. But I'm afraid I must be going now."

Dr. Kuro laughed maniacally as he ran away with the Separation Grass in his hands. "You fools! You really think you can save that boy? I want to see what happens when he's consumed by an Alpha Monster!" he shouted back at Kosu and the team.

But Kosu was not giving up that easily. "We have to catch him and get that herb back! We can't let him harm Jinpei any further," he said to the team.

Just as they were about to chase after Dr. Kuro, an email from the Adventurer's Guild popped up on Kosu's device. It was an urgent update on Jinpei's condition.

"Guys, we need to check this message first. Jinpei's condition may have worsened," Kosu said, his voice filled with concern.

The team gathered around Kosu's device to read the message. The email stated that Jinpei's condition had deteriorated rapidly, and the doctors at the Adventurer's Guild were at a loss on how to save him. They needed Kosu and the team's help urgently.

Kosu's heart sank as he read the message. "We need to get back to the Adventurer's Guild right away. We can't waste any more time," he said.

The team nodded in agreement, knowing that every second counted. But they also knew that they couldn't let Dr. Kuro get away with the Separation Grass. It was their only hope of saving Jinpei.