I SENPAI AND THOU NAGATORO PT. 2

 By the time of installments 22 and 23-- which I'll give the collective title of "Senpai, Let's Go to the Beach"-- the Naoto-Nagatoro relationship has settled into a rough routine. Naoto tries to remain aloof, and Nagatoro tries to pull him out of his shell. In this project she receives some ambivalent help from her girl-buddies Gamo and Yoshi, who also find Naoto amusing, though they're also entertained by Nagatoro's increasingly evident affection for her "victim."

So the foursome's trek to the beach to escape summer heat begins with the three girls mocking Naoto as usual. 

But being at the beach also highlights some sexual aspects overshadowed at high school, which involve Nagatoro seeking to get her share of "the male gaze" from Naoto.

Despite this exposure to nubile female flesh, Naoto refuses to gambol in the waves with the girls, remaining on shore. However, after a while Nagatoro can't resist ringing his chimes again. And in truth, Naoto hasn't totally distanced himself from the possibility of innocent fun, for Nagatoro soon learns that he's wearing swim trunks despite having claimed no desire to go swimming. 

Up to this point, despite having teased Naoto as an "it" (specifically, a sea louse), she's clearly trying to relate to him as a "thou" (a fellow being who needs to get out of his own way). But Naoto still plays hard to get. Nagatoro wants to apply sunscreen to his pale skin so he'll have no excuse to stay on the beach, and Naoto comes up with the excuse that only "lovers" rub lotion on each other's bodies.

This results in an extraordinary sequence. Since Naoto rejects her "thou" offer, Nagatoro rather easily slips back into "it" mode. Since the young student claims that he doesn't want to get lotion administered via her hands, she squirts some on him and then begins rubbing it in with her foot. Author Nanashi does not stint on showing that Nagatoro is clearly stimulated by making Naoto her footstool, and he doesn't show any desire to resist her rough ministrations. However, when her two friends try to join in, rationality asserts itself, and she tries to make them desist. 

Despite this display of teenage hormones, Naoto is fully slicked down with SPF, and he allows himself to join the girls at their seaside games. And the episode ends with Naoto admitting to himself that he enjoyed the idyll at the beach, even with all the teasing involved. With episode 24, Naoto will begin thinking that he shouldn't let Nagatoro take the initiative in their strange relationship all the time-- which becomes an important trope for the remainder of the series.