Marked by the cursed Darksign, Naruto Uzumaki finds himself tethered to two worlds: the unforgiving lands of Dark Souls and the shinobi realm of ninja. How will a world of Dark souls face a Chosen Undead with chakra? And how will the shinobi world confront a warrior reborn in the Lands of Lordran?

Mugetsu transmigrates into the world of Naruto as an ordinary Chūnin instructor in Konoha-while secretly serving under Danzō's Root Organization. Knowing that weakness means death, he resolves to change his fate. When the Teacher System awakens, Mugetsu gains power through his students' growth. [First A-Rated Teaching Evaluation Complete - Reward: Mastery in Fire Release Chakra Nature Transformation.] [Student Shisui gained +30 Chakra. You gained +60 Chakra.] From mentoring Shisui, Kakashi, Obito, Guy, and Rin, to researching Sealing Techniques and Breathing Styles, Mugetsu quietly shapes Konoha's future geniuses while growing into a legend himself. But as the Third Great Ninja War approaches and Root's shadow closes in, Mugetsu must decide-will he remain a pawn of Danzō, or rise as the teacher who forges the next generation of heroes?

After transmigrating into the Uma Musume world, instead of becoming a trainer, I somehow unlocked the [Horse Girl Treatment System] and ended up as a doctor?! To level up my medical skills and become a legendary healer, Lin Anran activated a system quest-only to find out he had to turn into a horse girl and win races?! And the characters he could transform into were... [Platinum · Centaurea] and [Margaret · Nearl]?! Wait-since when do Pegasus count as horse girls?! But the first leg of the Triple Crown, the Satsuki Sho, was already over-no chance at a perfect Classic Triple Crown now. All or nothing! After transforming into Platinum, he set his sights on the unprecedented [Irregular Triple Crown]! Then, switching to Near Light, he stormed the dirt tracks of the American Triple Crown, charging straight into the Dream Cup to face legends like Secretariat and Man o' War! Between all the winning, his medical career somehow took off too. "Hey... can you promise to treat only me, forever?" "I never enjoyed racing before... but for Dr. Lin..." Lin Anran: "Gahhh, stay away from me!!!"