"How about this?" Mutsumi asked, red in the face as she pulled aside the curtain with one hand while covering her chest with the other.
"You look great!" Takebayashi said, giving the redhead two thumbs up. "But why are you covering this up? Move your hand!"
"It would be fine if it was just you..." Mutsumi took a few steps back, sliding the curtain shut again. "But Sanada-kun is there! It's embarrassing!"
"Jeez, you're such a kid... I'm coming in." Her friend sighed, entering the changing booth with Mutsumi and looking at her. "Better?"
"..." The sixth sister jumped, nearly bumping into one of the walls. "NO! Takebayashi! Not cool!" She picked up some nearby clothes, the other swimsuits they picked out for her that she hasn't tried yet, covering her chest with them. "Don't just do that!"
"But I'm telling you, you look great." Takebayashi insisted, taking slow steps toward Mutsumi and showing her her reflection in the mirror. She removed the fabric that Mutsumi was holding up to cover herself. "Mutsumi, you really are beautiful, you've got to use it." Placing her hands on Mutsumi's shoulders, she forced the girl to look at herself in the mirror. The way her bikini fit her accentuated her curves and ample chest, allowing for her body to shine in ways it hasn't done before since she used to always dress in baggy or oversized clothes. Mutsumi took a good look at herself, her fingers tracing her curves before she opened her mouth in awe.
"Damn... I'm hot." She joked before she grinned mischievously at Takebayashi. "Hey, hey... since we're already here, how about you get one too? I'm sure Sanada-kun would love to see you model some swimsuits too." She winked, getting one of the swimsuits they picked up and placing them in front of Takebayashi as she maneuvered to her behind.
"Mutsumi, that won't work..." Takebayashi said reflexively before she got a closer look at the swimsuit. "Actually...maybe... Get dressed and get out, I want to try that one on."
After her shopping trip with Takebayashi in preparation for the pool, Mutsumi returned home and instantly went to her room. Her desk was filled with her more recent projects, along with the robotic snake that came to be her favorite pastime. From robotic heads with controllable eyes and jaws to imitation animals with speakers for their calls, the sixth sister loved to tinker with things whenever she wasn't making lesson plans for her sisters or scheming something to further their relationship with Fuutarou. However, her current project was a lot simpler and normal; no hidden microphones or cameras, no tracking chips, nothing suspicious. "So, which one to go with?" Mutsumi asked herself, holding a few small cube-like devices that came in plastic bags. She pressed down on the navy-colored step that stuck out of the top, hearing a loud and crisp click as her finger touched the transparent housing.
On her desk was a small circuit board that was around the size of a keyboard's Numpad. Slightly to the side of that was another plastic bag with similar-looking cubes, except the stems were a deep purple color. Just beyond that was another bag of those cubes, except that the housing was opaque and that the stem lacked the box-like feature that the other two had. Ultimately deciding on the navy variant, she got enough from the bag and started assembly, pulling out a case to house the circuit board as well as a plate to mount the small clicking switches in place. After soldering and screwing everything into place, she pulled out her laptop as well as a short cable to connect the two.
"And..." Mutsumi was about to press down on one of the switches when she remembered something. "Right..." She muttered to herself, opening a drawer to pull out a box that housed a set of keycaps, navy, and orange colored. After finding the right caps and placing them on the switches, she pressed the button, looking at her screen as it registered the key and typed out the number she pressed. Testing it with all the keys showed that they all worked. With that done, she cleaned up the rest of her things and pulled out another project that was in the works, a small robot that she wanted to walk around her desk to play with when she was bored.
"Mutsumi! Dinner's ready!" Nino's voice stopped her before she even got started on it.