All of the character are of age. In this futanari world, girl's don't go to high school until they are 18.
*
It was early in the morning, and Tonya sat at the table eating breakfast with Umi. She was heading out to work soon and Umi was up early as she always was. Taki was in the other room, watching last night's P.F.F. matches.
"Are you still going to meet that girl today?" Tonya asked.
Umi nodded her head as she ate.
"Good."
Tonya was surprised when she came home last night and heard about Umi's day. She was incredibly happy to see Umi making friends and being more sociable, but she also knew it was probably very stressful for someone as introverted as her daughter.
"Your friends are going with you?"
"Yes."
There was a bit of silence as Tonya waited to see of Umi would say more. A loud cheering came from the television and Taki mumbled something.
"Sounds like you made some good friends. You didn't even have to ask them for help."
Umi paused for a moment as she thought about it.
"Yeah, they are."
"Make sure you thank them."
"I will."
Tonya got up and walked around the table to Umi, putting her hand on Umi's head and rustling her hair.
"I'm really proud to see you making an effort. I got to go to work. Tell me all about it when I get home, okay?"
"Okay." Umi got out of her chair and hugged Tonya. "Bye, dad."
"Bye, Umi. Bye, Taki. See you tonight."
"Bye." Taki waved her hand from the couch as she watched the match.
Tonya left and Umi finished eating. She headed back upstairs and went to her room. Umi was uneasy, but also excited. She sat and played on her computer for a while to distract herself. When it was time to leave, she grabbed her things and headed downstairs. Taki had already left, and Mina came out of the kitchen with her hair tied up and dressed in her exercise clothes.
Her clothes were little more than a tight sports bra and small pair of panties. She also had on a special girdle made of stretchy material the held her massive dick tight against her stomach and lifted her balls up, making it easier for her to run.
"Oh, Umi." Mina said, hugging Umi and squeezing her against her cock. "I'm going to my exercise class this morning, would you like me to give you a ride to the subway station?"
"Yes, please." Umi answered as she followed her mom into the garage. They got into the car and left.
"It sounds like you're going to have an eventful day." Mina said as they pulled out of the driveway.
"Yeah."
Mina reached over and rested her hand on Umi's dick, giving it a squeeze.
"Oh, come on. Cheer up. You got a secret admirer." Mina said.
"I-I don't know about that..." Umi replied, feeling a bit embarrassed about how excited she got when she told them about it at dinner the night before.
"I think so. I had an experience like that before."
As they drove, Mina told her about an old coworker she used to work with who was always awkward around her. Mina talked to some of the other girls and found out she just wanted to fuck, but was too embarrassed to ask. When Mina had a chance, she simply whipped out her cock, walked up behind the girl, and rammed it in.
They ended up becoming friends and it became a game among the employees to sneak up behind each other and try and get them to cum in front of a customer by only using their dick. Mina recalled one day when three girls made attempts on her. When she had a chance retaliate, she was way more sensitive than she thought and ended up blowing her load. The customer noticed when her coworker's stomach suddenly ballooned.
"For some reason some people get weird around big dicks."
Mina pulled up to the curb and Umi got out of the car.
"Oh my, I got a little too excited." Mina laughed. Her cock had been slowly growing as she drove, and had become so large and erect that it stuck out well past her girdle and rested between her breasts. She pulled up her sports bra, exposing her breasts. She pushed her cock between them and pulled the bra back down, using it to keep her now massive throbbing dick in place.
"Bye Umi, have a good day!" Mina waved from the car.
"Bye, mom." Umi waved back and walked down the stairs into the subway terminal. She was a bit early, so she sat on one of the benches and waited for her train.
Umi thought she would be more nervous, but she felt strangely calm. Perhaps it was because her first three days had been so eventful that she was simply too tired to feel nervous. She was ecstatic that she had made some friends and was doing normal friend stuff, but she also could not wait for the weekend so she could take a breather.
The subway arrived and Umi boarded her car along with the usual office workers. There was already a fair bit of action as two women were laying on top of each other while arguing who had a better pussy. The argument was being settled by a third woman who had two dicks and was fucking them both at the same time. A bunch of their co-workers were watching and betting on which dick would cum first.