Convergence

Some time after a tragedy in his life, our MC finds himself stumbling back into the life of his childhood friend, Sayori, and Monika - his old confidant from first year. As he gets to know everyone in Monika's literature club and rekindles the friendship the two have been neglecting for some time, he comes to learn that there's more to Sayori's friendship than he could've realized. As the skies over her grow cloudy, will he and Monika be able to carry her through the rain? Or will they end up diverging and leave him wandering down his own broken road alone?

[From Reddit]