Nagi and Erika’s “home-swap” is off to a rocky start. While the Ama-Umi House is being renovated, Soichiro suggested that Nagi go to live in the Amano household, while Erika moves in with the Uminos. Erika enjoys her first experiences of conveyor-belt sushi and familial harmony, but Nagi finds himself butting heads with Ritsuko, his birth mother. On top of that, Erika runs away after trouble at the Umino house. Will Nagi and Erika be able to return unscathed to the Ama-Umi House?!
Time to get serious! Soichiro has ensured that Nagi and Erika are suddenly much closer, and the other heroines quickly see the situation as a threat. Ai plans a luxury Korean BBQ date with Nagi, Hiro shares an umbrella with him, and Sachi goes with him on a trip to the beach! The love pentagon continues to escalate!
Shinjo from the dance club has challenged Nagi for the right to date Sachi. The only problem is that the challenge centers on the school sports festival…and Nagi has never participated in one! A scavenger hunt, a three-legged race, and an obstacle course… Will the introverted Nagi finally take part if it’s for Sachi?! Add in Erika, who’s prepared to enjoy the festival to its fullest, and Hiro, who’s part of the planning committee, and Megurogawa Academy is about to have a sports festival for the history books!