Otoko Ippiki Gaki Daisho (First Shonen Jump series, 1969) serial 01, part 4

In Part 4, Mankichi visits Tomoko, the girl from the boating incident, to apologize. To make it up to Tomoko, he takes her for a fun afternoon outing, with a watchful granny in tow. Later, Mankichi gets his anticipated revenge match against Gontaro.

Part 1 is here: https://nyaa.si/view/1149811 Part 2 is here: https://nyaa.si/view/1150134 Part 3 is here: https://nyaa.si/view/1150401