Yahari Ore no Seishun Love Comedy wa Machigatteiru.

Synopsis

The Summer camp continues and Shizuka asks the Soubu group to prepare a 'test of courage' and bonfire event for the evening. After some preparations, the Soubu girls relax at a nearby river and Rumi joins Hachiman on the bank where he outlines the waning probability of holding on to elementary school ties as one grows older. However Rumi explains that she had already given up on making friends based on reciprocating her current treatment to her peers in the past. In order to assist Rumi, Hachiman proposes that the Soubu group create a source of conflict within the peer group that shuns Rumi. This would reveal their true self-allegiance and ultimately shatter the ties between them, thus moving the focus away from Rumi. The plan then seems to work when they implement it during the 'test of courage', until Rumi saves the girls in a dramatic turn of events. Afterwards during the bonfire event, the Soubu group notes that Hachiman's unorthodox plan had set the stage for the girls to split apart after betraying each other and hence slightly improve Rumi's situation. The camp then ends the next day and when Haruno comes to pick Yukino up, Yui and Hachiman recognize the Yukinoshita limousine as the one that struck Hachiman in the accident. (Source: Wikipedia)