Minato's Laundromat

Season 1, Episode 11: First Overnight Trip Together on a Tokyo Date!?

Select Source

With his eyes all set for a university in Tokyo, Shintaro invites Akira to attend the open house event at the Tokyo Eiwa University to which he willingly agrees to guide Shintaro around the city. The two are also joined by Asuka who decides to visit Tokyo for his own apparent reasons. However, as they are supposed to return that evening, they unfortunately happen to miss their ride back home thereby resulting in Shintaro and Akira spending the night together in a hotel for the very first time.