マジで付き合う15分前

Yuki and Natsuba, childhood friends living in the same apartment building, have always been inseparable. As high school graduation nears, a playful moment on their walk home leads to an unexpected decision to start dating. What begins as a lighthearted choice soon deepens into real feelings, blending their familiar bond with the excitement of new romance. (Unreviewed summary by Grok 2)