FROM STRANGERS TO FAMILYWhen his father remarries, Yuuta Asamura winds up sharing a roof with a brand-new stepsister, who is also the hottest girl in his grade! But Yuuta and his new sister, Saki Ayase, have no delusions—they both carry trauma from their parents’ difficult divorces, and they agree to keep a respectful distance. As it turns out, however, the two have a lot in common, and slowly, cautiously, they grow closer. But is the emotion blooming between them simple admiration, famili...

The faster one moves in space, the slower one moves in time, and the faster one moves in time, the slower one moves in space. This is the basic theme of this book. It is a relation between space and time where time is nothing but a dimension like space. A tug of war of "c" between space and time is what makes the entity of spacetime exist. Where "c" is the speed of light. Thus, the speed of light is the speed of existence.Wherever there is spacetime, there is relativity. The creati...

Saki and Yuuta have finally found a small group of people who accept their relationship, but big changes are coming for them as they enter their final year of high school. The pair must navigate being in the same class, preparing for college entrance exams, and planning for the future as they approach their new family's first anniversary. They've grown so much closer over the past year, but it may be time to reevaluate that distance.

Satisfy your curiosity to learn complex astrophysics concepts non-mathematically.If you are curious to enjoy complex astrophysics concepts and want to skip math in between and rather enjoy physical illustrations then you are at the right place. Don't let complex differential calculus, tensors, coordinate transformations, etc hinder your curiosity to know our universe (at least at some scale!). The book will fulfill your non-physicist level of curiosity to learn ast...

HAPPY BIRTHDAY, YUUTA AND SAKI!Infected by the magic of Halloween night, Yuuta and Saki sought out each other’s warmth. Though their relationship might look the same to those around them, everything is different when they’re alone. As the two spend winter together for the first time, including birthday, Christmas, and New Year’s celebrations, they struggle to balance communication and the joy of surprise. How can they make each other happy, and where are they headed? Are marriage and child...

JUST SIBLINGS, OR SOMETHING MORE?Yuuta and Saki begin a secret double life and a relationship they can’t name—they’re still siblings, but they’re also teens who might just be in love. It’s time for new experiences, like going on their first date, getting into fashion, attending a friend’s birthday party, and celebrating Halloween. They’ve lived their lives without expecting anything from others, but as they spend more and more time together, those feelings begin to change. And gradually, t...

When high schooler Yuuta Asamura learns his father plans to remarry, he’s not too bothered by the idea…until he finds out his future stepmom has a daughter! Her name is Saki, and to Yuuta’s surprise, she’s a beauty who’s made a reputation for herself as an unapproachable “bad girl.” But as he gets to know her, he realizes she’s not the person everyone says she is. Could he be the one she finally opens her heart to?

ROMANCE OVERSEAS? After spending their first New Year’s together, Yuuta and Saki grow even closer. February brings Valentine’s Day, a school trip to Singapore, and, in turn, new encounters and realizations. Yet despite these special events, the pair must maintain a certain distance in order to keep their secret, and so they feel lonely even when together. What will happen when the stepsiblings, who have always kept themselves in check, begin to explore a new, more selfish kind of happiness...

TAKING SOME TIME APARTWhen Saki called Yuuta “Big Brother,” it looked to everyone else like their relationship had taken a big step forward. But in reality, it was more like a line drawn in the sand. As their hidden feelings make being together increasingly awkward, the two of them explore new relationships and weigh their priorities. Are some things worth holding on to despite the consequences, or is it time to let go and move on?

ALL WORK AND NO PLAY ... It’s Yuuta and Saki’s first summer vacation as stepsiblings, and they’ll be working at the same bookstore! As Saki’s coworker, Yuuta begins to see a side of her he hadn’t noticed before. But after observing her new coworker for a while, Shiori makes a dark observation—if Saki doesn’t ease up and stop pushing herself so hard, sooner or later she’s going to fall apart. In order to help her, Yuuta will have to make a decision. Should he interfere in his stepsister’s l...

IMAGINE SPACETIME is a science (Physics and Geography) news and information channel and Science eBook Publisher. The channel and website is founded and owned by Hiten Shelar who is an Astrophysicist and Bestselling Author. Inspired by his Book, IMAGINE SPACETIME, the science platform aims at delivering quality content on interesting topics on Astrophysics, Astronomy, Geography, Oceanography, and other related subjects. The website covers various Topics on Science, Technology, and Engineeri...

Astrophysics and Cosmology for Non-mathematicians is a combination of Astrophysics for Non-mathematicians and Cosmology for a Newbie.