The Daichi family faces internal turmoil as mom Seiko, driven by materialism, seeks a divorce from her otaku husband Mamoru. Amidst this chaos, overburdened daughter Nozomi feels unappreciated, while foul-mouthed son Dai witnesses the family's disintegration. Unexpectedly, the Galaxy Federation enlists the dysfunctional Daichis to protect Earth from alien dangers, presenting a unique opportunity for the family to not only safeguard the world but also mend their fractured bonds.