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.

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?

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...

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...

Now aware of their feelings, Yuuta and Saki are still unsure whether the affection they have for each other is familial or romantic. To find out, they decide to try deepening the bond between them, unbeknownst to their family and friends. As Halloween approaches, will those secret, uncertain emotions develop into something more…?

HOW CLOSE IS TOO CLOSE?Yuuta Asamura is still figuring out how to interact with his new stepsister, Saki Ayase. After discovering they have more in common than expected, the two reach a comfortable equilibrium, but things start to get out of whack when Saki fails one of her exams and asks for Yuuta’s help. Then Yuuta’s attractive college-age coworker, Shiori, invites him out on a date, and Saki finds a strange new emotion welling up in her heart…Just what is this feeling?

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...

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...

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

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...

"Hey there, are you ready to dive into the mysteries of the cosmos? If you've ever wondered why our universe is expanding, how a photon perceives the universe, or if everything is predestined from a photon's perspective, then you absolutely shouldn't miss out on this book!Hi, I'm Hiten Shelar, an Astrophysicist and Author of a Bestselling Astrophysics for non-mathematicians book. Back when I was just starting out in the world of Cosmology and Astrophysics, I had a ton of burning...

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?