Shuugakuryokou de Nakayokunai Group ni Hairimashita

Hioki, an ordinary high school student, is feeling down after being placed in a new class without any of his friends. Just as he fears facing the upcoming school trip alone, he finds himself grouped with the super cool and popular Watarai. Though initially intimidated, Hioki's nervousness fades as Watarai constantly stays by his side, always looking out for him. As the two slowly grow closer and open up, Watarai's deep obsession begins to show... (Source: Starts Publishing, translated)