Episode 185

The Day of Days is 18th episode of InuYasha: The Final Act.

Plot
Kagome travels back to her time for her entrance exam as the others wait for Kohaku to wake up and Sesshōmaru was going out to kill Magatsuhi.

As Kagome realizes that no one is around (her family won a trip to a hot springs and there's no school because it's a Sunday) for the time being, she falls asleep only to wake up to Inuyasha in her bedroom. He tries to convince her stay in her own time until Naraku is defeated, but Kagome decides to keep fighting in the hopes that her powers (which were sealed by the jewel in response to Kikyo's first wish as she originally died to stop fighting) will eventually come back. Inuyasha responds by promising to protect her with his life, and the two almost share a kiss. But before their lips can actually touch, they are interrupted by Sōta, announcing he and the rest of her family have come back from their hot springs trip, killing the moment.

After ten days, Kagome leaves home for her entrance exams, but Inuyasha, who is hell-bent on keeping his promise to her that he will protect her with his life, follows her. When Kagome accidentally leaves her bag on the train on her way to her school, Inuyasha gets it back for her by smelling her scent on it, and she gratefully hugs him for it. Unfortunately, she leaves her ticket to get into the exam at home - but her mother saves the day by showing up just in time and gives it to her.

Trivia

 * This episode shows Inuyasha and Kagome's almost-kiss.
 * When Rin thought that Sesshōmaru was leaving her in the village indefinitely she was shocked and upset to the point where she shouted that she was going with him. Showing her intent at wanting to stay with him.