Gintama Season 3 Episode 13: All Mothers Pack Too Much Food into a Lunch Box and Ruin the Shape
Episode 13 of 51 of Gintama Season 3, aired June 30, 2015, 25 minutes. Available with English subtitles and dub where released.
Episode summary
Concerned that Seita doesn't seem to be making friends at temple school, Hinowa and Tsukuyo, believing the problem to lie with his lunch box, attempt to fix the problem but only seem to make it worse.