"Uchi no Otouto Maji de Dekain" is available to stream on various platforms, including Crunchyroll, Funimation, and HIDIVE. You can also purchase DVD and Blu-ray copies of the series on Amazon or other online retailers.
However, things take a turn when Asahina's friends and acquaintances start to develop feelings for Umetarou, who they believe to be a cute and charming elementary school girl. Unbeknownst to them, Umetarou's demeanor and behavior drastically change when she is around Asahina, revealing a more mature and seductive personality. uchi no otouto maji de dekain.