Episode 1: Dream

In the Saitama prefectural final, Isagi's Ichinan High trails Matsukaze High by a goal, with a Nationals berth on the line. Breaking into the box, Isagi is urged by his coach to stay a team player and slides the ball to Tada-chan, who clangs it off the post. Matsukaze springs the other way and Ryosuke Kira converts to bury Ichinan for good. Kira gives a modest post-match interview, while Isagi's coach mourns the third-years leaving yet calls this his finest squad.

Walking home, Isagi stews over being an anonymous name on his own roster, doubting his dream of hoisting the World Cup like his idol Noel Noa. He wonders whether shooting instead of passing would have rewritten the result, then weeps at a loss he could not fix by himself. At dinner his mother, puzzled the team fell short after she cooked pork cutlet for luck, hands him a letter from the Japan Football Union declaring him a certified athlete.

Reporting to the listed address, Isagi runs into Kira, who backhandedly praises his passing brain while implying he cannot finish. Inside they join a room packed with forwards, where Jinpachi Ego greets the 300 under-18 strikers he alone selected. Ego reveals the Blue Lock facility, a place that will forge one man into the planet's best striker while barring every dropout from ever wearing Japan's colors. He preaches ruthless scoring over cooperation, cites egoists like Noa, Cantona, and Pele, and challenges the recruits through a door. Isagi bolts first, and the others stream after him.

Transported into the compound, Isagi draws number 299 and is sent to Room Z, where his new bunkmates double as rivals ranked by the digits on their kits. Ego explains that the top five will enter a tournament and register as forwards for the U-20 World Cup, while losers forfeit any national future. He then launches a game of tag: one ball, 136 seconds, and whoever is tagged "it" at the buzzer is eliminated.

Igarashi, ranked dead last at 300, starts as "it" and flails at his roommates. When a chaotic scramble leaves Isagi a clean chance to knock Igarashi out at the final second, he freezes, deciding he must topple someone stronger rather than the weakest man present. Bachira, delighted by that choice, snatches the ball, then loops it so Isagi can drill Kira in the face, flipping the tag to Kira just as time runs out.

The premiere adapts the opening chapters of the manga and belongs to the Introduction Arc. Its ending theme is Chaos ga Kiwamaru. The closing Additional Time skit, "Isagi Yoichi's Dream," has his parents reminisce about his football-obsessed childhood: begging Santa for the World Cup trophy, sobbing when matches were switched off, and neglecting homework. They marvel at his luck in being chosen, which leaves Isagi feeling quietly mocked.