After the town's dungeon disappeared without a trace, the City Hall began an investigation into the matter. During the investigation, they discovered that Jinpei had gone into the dungeon with Kosu, despite being forbidden to do so. The City Hall considered Jinpei's actions to be reckless and dangerous, and they believed that he might have had something to do with the disappearance of the dungeon.

As a result, Jinpei was placed under house arrest and banned from entering any dungeon. The City Hall wanted to keep a close eye on him and make sure that he did not cause any more trouble. Jinpei was frustrated by the situation, as he knew that he had not done anything wrong, but he also understood that the City Hall was just trying to protect the town.

Jinpei sat in front of his computer, staring blankly at the screen. He had been trying to contact Kosu all day but to no avail. Every time he sent a message, he received an auto-reply stating that Kosu was on a mission and could not be reached. Jinpei was worried about his partner. He knew how dangerous the dungeons could be, especially when dealing with the Black Sun organization.

With a heavy heart, Jinpei decided to focus on something else for a while. He opened the code of his virtual world game "Dungeon of Earth" and started working on a new feature he had been thinking about. He called it "familiar practice."

Jinpei had noticed that since he bonded with Drake, he had a special connection with him. He thought that maybe he could use this connection to train him in the virtual world. He started to write a program that would allow him to do just that.

As he worked on the program, Jinpei found himself getting lost in the code. It was a welcome distraction from the worry and anxiety he felt about Kosu. He tested the program with Drake and was delighted to see that it worked perfectly. He spent the rest of the day practicing with his familiar, teaching him new skills and techniques.

As Jinpei immersed himself in the virtual world, he could feel Drake's presence more and more. The dragon familiar was growing stronger with each passing day, and Jinpei was determined to help him reach his full potential.

Using the new familiar practice feature he had added, Jinpei trained Drake in various combat techniques, teaching him how to use his fiery breath and sharp claws to devastating effect. The virtual world was the perfect training ground, allowing Jinpei and Drake to practice without risking their lives in the real world.

As they trained, Jinpei couldn't help but think about Kosu. He missed his friend and wished he could be there to help him in the real world. But for now, Jinpei had to focus on Drake and their training.

As the day wore on, Jinpei felt himself getting tired, both physically and mentally. He had been training with Drake for hours, and the strain was starting to show. He decided to take a break and logged out of the virtual world.

As he emerged from the virtual world, Jinpei saw that it was already late at night. He stretched his arms and yawned, feeling a sense of satisfaction from the progress he and Drake had made.

Jinpei looked at Drake, who was resting on a nearby cushion. The dragon familiar looked up at him, as if sensing his master's mood. Jinpei smiled and stroked his head, feeling a sense of comfort from the familiar's presence. Even though he couldn't leave his apartment, he knew that he still had Drake and the virtual world to keep him company.