Shishi mo Kobamazu

Yuzuru is a tough-looking delinquent whose intimidating appearance hides a deeply grateful heart. When his family falls into severe financial trouble, it is his upperclassman, Satomi, who steps in to offer crucial assistance. Determined to repay this life-changing debt of gratitude, Yuzuru approaches Satomi with an unusual request: he begs the older student to let him become his sworn younger brother. Once Satomi reluctantly agrees, Yuzuru immediately dedicates himself to serving his new senior, shadowing his every move and meticulously tending to his daily needs. However, Yuzuru’s relentless devotion quickly becomes more of a burden than a blessing. Satomi finds himself increasingly frustrated by the constant, overbearing attention, struggling to find even a moment of peace away from his eager underclassman. Despite Satomi's growing irritation, Yuzuru stubbornly refuses to back down or scale back his efforts, convinced that absolute loyalty is the only way to properly express his thanks. The exhausting dynamic between the two finally reaches a breaking point when Satomi, driven to his limits by Yuzuru's unwavering persistence, makes a sudden and unexpected proposition—asking the devoted delinquent to sleep with him.