Masaki is living a regular high school life in Shonan while staying at the home of legendary board shaper Tadao. In the early mornings, he goes out to ride the waves with Kosuke and Yuta. Then, he goes to school. After classes, he goes back to the beach. Day after day, he lives a life of contentment, immersed in surfing. Amidst all of this, little things that Masaki does pile up, angering Kosuke. Unable to let go of his indignation, Kosuke challenges Masaki to a surfing match...
I guess... I must have made him angry 
about lots of things without realizing it.
ربّما... أثرتُ غضبه حيال أمور كثيرة دون أن أشعر
S-Scheint, als hätte ich ihn ziemlich wütend
gemacht, ohne es zu merken.
Parece que lo molesté
con varias cosas sin darme cuenta.
Parece que lo he hecho enfadar
con varias cosas sin darme cuenta.
On dirait que je l’ai mis en colère
sans faire exprès.
Credo di averlo involontariamente fatto arrabbiare
con alcuni miei comportamenti...
Parece que eu o irritei
com várias coisas sem perceber.
Видимо, я сам не заметил,
как разозлил его.