The story of the original novels revolves around a protagonist who experiences various spiritual encounters due to his upperclassman at his college's club, the "master teacher" in the series title that has spiritual sensitivity. (Source: Anime News Network)

Clara had been oppressed for many years by her tyrant sister, Enefia. Even their parents obeyed the sister's wishes, and Clara had no place in the Baron Astraia's household despite it being her home. In the midst of this, Clara's sister's engagement to a prominent nobleman was decided, and Clara finally felt relieved, believing she would be freed from this hell. However, even after the engagement, the sister's unfaithful nature did not change, and fearing the fiancé might discover the inconvenient truth, the parents ordered Clara to monitor her sister. Despite Clara's efforts, her sister became pregnant with another man's child. The engagement was broken off, and the sister quickly eloped somewhere, leaving the Astraia household with a huge debt and angering the influential nobleman. In order to repay her family's debts, Clara was sold to a sadistic noble and faced severe torture, ultimately approaching death. "If I could do it over again... This time, I will definitely kill you!" When Clara opened her eyes again, time had rewound to the day of her sister's engagement. Revived with strong determination, Clara pushed back against her sister's insidious bullying and ran to change the worst possible future. (Source: Shueisha, translated)

A 4-koma anthology of Log Horizon by various mangaka.

Hundreds of years ago, 48 sexual positions were created and named, it is the equivalent to the Japanese kamasutra. It is likely that these moves were devised during the Edo period (1603-1868), reflecting the 48 set of moves that Sumo wrestling recognizes. 48 different manga artists came together and created one shots for each different position. In this first volume, 24 of those positions are featured.

Eiji, who aims to be a "God-tier artist" at an arts high school, felt daily anxiety and impatience due to the high skill level of those around him. For him, the only one who can put his mind at ease is his classmate Reona, who is terrible at drawing! A slapstick art-school romantic comedy about looking down to feel secure and looking up to dream!! *Source: Comic-Walker, translated*

In my past life, I struggled through countless part-time jobs, only to suffer a head injury in an unexpected accident. But when I opened my eyes, instead of a hospital ceiling, I see a traditional Eastern-style house? That’s right! I’ve reincarnated into the novel "The Noble Sons of the Namgung Clan," the very book I was reading before I died! Of all places, I woke up in a crazy story where people drop like flies… And worse, I’m a villainous side character who gets abandoned by her family and is the first to die a meaningless death! Fine. With all the experience I gained from my past-life jobs, I’ll escape this house before I meet my doom. Wait, what? Every time I show off my skills, the main characters start falling for me? The cold-hearted older brothers, the vengeful cult leader, even the tragic crown prince—all of them are getting tangled up with me! If the story follows the original plot, everyone is doomed to a bad ending... Alright! If it’s come to this, I’ll save them all. A well-raised side character can save many lives!! (Source: Naver, translated)

Calendar Boy depicts the whimsical adventures of human personifications of national holidays on the Japanese calendar. Focusing on gags that are tied to stereotypes and images typically associated with holidays in Japan, like "New Year's Day" is a traditional Japanese individual, "Coming of Age Day" likes to drink, and "Valentine's Day" is an unrepentant casanova.

Based on the PS2 version.