In order to kill Majin Buu, Goku and Vegeta had to give their own lives. The Z Fighters were heart stricken for the loss of the last two full blooded Saiyans, but life continued on.
Goten gave up fighting for his mother Chi Chi, and went on with life going to school and having a great life. Mostly he spent his time fishing and playing outdoors. Once in awhile he would visit Trunks, but it was no longer the same after the loss of Vegeta.
Trunks became focused on his training as well as Gohan, but like his mother, researched inventions at Capsule Corp; as time went on his training diminished to just a couple of times a week if that, but he promised his father that he would continue to get stronger.
Piccolo returned to Namik to try and live a peaceful life, and enjoy the things in life that made living worth while. He was nominated protector of Namik plus he was respected by all his fellow Namikians. From time to time invaders would visit Namik for the Dragonballs, but were quickly stopped by the powerful Namik, though he never slowed in his training.
But as for Gohan, life had changed a little. He did continue on out of high school and into college; however his heart was not there anymore. His heart was thriving for his father absence, and a sense of inheritor of the role of savior of earth was passed on to him. So his training was number one in his life now. Gohan did get married and had his lovely daughter Pan, but he had this feeling in the back of his mind told him to be ready for the next threat to the earth. Not able to change into a Super Saiyan was not a problem anymore because all that power he would get from transforming was already at his finger tips.
It was now ten years since Goku and Vegeta died fighting Majin Buu, and all was well. The college that Gohan taught at was starting a space program and Gohan was heading it off. He was to take some of his students on a trip to a neighboring planet, one that was to Gohan's choosing. Well Gohan chose Namik fore, the Namikians were friendly people, the planet was one weeks travel away, and Gohan could visit his old master, Piccolo. The trip took place as planned and all went well. Gohan made sure all the students had all their supplies for the trip and the ship taking them was prepared well with everything they need to go on the trip. Trunks was there to see Gohan off since he was a close friend of Gohan's and Trunks designed the ship himself. Words were shared between the two old friends before the departure.
"So…um, say hi to Piccolo for me Gohan." Trunks said kind of uncomfortably.
"Don't worry I will. What is bothering you Trunks?" quizzed Gohan.
"For some reason I have a bad feeling about you leaving the planet. I feel as if you here assures the planet's safety. You are the only one of us that has truly kept up your training. What if something happens while you are gone?" asked Trunks with a low concerned voice.
Gohan sighed and said, "Trunks it's been ten years, I am sure things will be fine. I will only be gone for three weeks. Nothing will happen; besides if something does come up just call the ship and get a hold of me, I will come back as soon as I can if there is trouble. You know what, if it would make you feel better, but keep in contact with me everyday, morning and night. Ok?"
"Ok Gohan, I feel a little better, just be quick with your return, and be safe."
"I will Trunks. Don't worry. I will see you in three weeks. Take care of my brother for me will yah, don't let him fish all the fish out of that creek by my mom's house." With that Gohan boarded the ship with all his students and prepared to take off.
Bulma came on the monitor to instruct Gohan the controls plus wish him a safe journey. "Seems just yesterday you and I were headed to Namik with Krillin. Ah that was great times huh Gohan?"
"Sure was Bulma," Gohan replied with a smile.
The launch was set off and the ship, Gohan, and his students were off into space. The trip to Namik went well. Gohan kept his classes everyday with his students and took over some classes that belonged to other teachers as well just so the students didn't miss a thing. After classes Gohan would work out with his shipmates as well. He taught them a few things about fighting along the way. They played games at night, but basically had a good time during the whole trip to Namik.
They arrived on schedule. Gohan sent prior notice of their coming so arrangements were made for sleeping quarters and activities. When Gohan first got off the ship, Piccolo was there to meet him. All the students collected their things and took them to the homes they were assigned. That night a party was held in honor of the guest from earth and of Gohan for helping defeat Frieza those many years ago. All was quiet and good by night fall.
Gohan returned to the ship for his daily call to Trunks back on earth. Trunks picked up and they discussed the normal, how their moms were doing, how many fish Goten caught, Krillin's new son, and how the trip was going. All seemed well on earth as on Namik, so Gohan went to bed believing everything was fine.
During the night Gohan was bothered by a nightmare. It was a vision of the earth being destroyed again. It was the type of dream he hasn't had for a long time, although this dream was some how real. A battle cruiser was itching its way towards earth. Gohan could even see the faces of the men traveling in the alien vessel. In a flash a vision came to the dream of the earth demolished. Gohan's mother was crucified, and his brother's head was placed on a spear tip for display in the middle of a city. This image woke him in a cold sweat. He hung his feet over the edge of the bed and looked around checking where he was. Taking a minute to clear his head, Gohan got up and got some water.
Deciding to ease his mind Gohan went to the space ship to check with Trunks to make him sleep better. He turned on the communications control panel, yawned and beaconed for Trunks. Gohan waited awhile for a response and he didn't get an immediate one. After about forty-five minutes, he beaconed again, but the response he got was not what he was expecting. A little red devilish looking creature answered the call. Laughing methodically and like a little kid, it started to talk in a strange language to Gohan plus punching buttons on the control board. Gohan was first distracted with the little creature, but soon noticed what lay behind him…nothing but ruble. Instantly his heart dropped to the floor, and worry took over as he called out Trunks name as he held down the microphone button. No response but the little devilish looking creature. Before long the picture was gone for the reason that the creature launched a ki blast at the screen, aiming for Gohan.
In a rush of fury, Gohan quickly found Piccolo and asked him to watch the students; he had to return to earth. Piccolo protested that he should go with him, but Gohan said no since earth his planet to protect not the Namik's. Gohan boarded the ship and told Piccolo that he would return for he kids soon and to tell them he had to go as the earth is under attack. A roar was heard for a couple of miles as the ship took off from the planet's surface. Before anyone knew it, Gohan was on his way back to earth.
