Zettai ni NTR Nai Kasshoku Osananajimi!

Yuu and Natsu are childhood friends who grew up together in the countryside, often playing together. As they enter puberty, they begin to develop romantic feelings for each other. Despite Natsu's tan complexion, there are no instances of romantic betrayal or infidelity in their relationship. Their mutual affection is supported by their friends, who encourage their bond. The story is a lighthearted romantic comedy focused on their growing relationship.