Kimi No Na Wa (Your name) Explained!

First day of switch

First Day of Switch

Now let's look at the events that happen during the body switching. Kimi No Na Wa begins with Mitsuha waking up and looking all confused at her room.
This is because it's Taki waking up in Mitsuha's body. He thinks it's a very realistic dream and comments on how realistic the breasts feel. He looks in the mirror to confirm that he's in a girl's body. He learns that this girl's name is Mitsuha. After this, we see Mitsuha coming out for breakfast.
This is the next day. We don't get to see Taki's first day in Mitsuha's body in Kimi No Na Wa. The next day people just tell Mitsuha that she had lost her marbles the previous day. She can't understand why people are saying that. She obviously can't remember anything because she was in Taki's body.
Kimi No Na Wa only shows Mitsuha's first day in Taki's body. Taki (as Mitsuha) loses his way to school, has his friends Tsukasa and Shinta confused, enjoys a meal at a cafe and finally lands up for work at an Italian restaurant.
Here we are introduced to Miki Okudera a girl who works at the restaurant too. It is shown that Taki and the rest of the guys have a crush on Okudera. An incident with a jerk at the restaurant results in Okudera being left with a torn skirt. Taki (as Mitsuha) stitches it up and adds a pretty design. Okudera mentions that she has never realized Taki's feminine side. Later at night, Taki (as Mitsuha) goes through his phone to see memos and enters a memo about the day.

Both Taki and Mitsuha brush their odd experience aside thinking it is a dream.