After all CGs are unlocked, Type-Moon's girlfriend comes to visit

"Playful Type-Moon" is a gal game with a high degree of freedom. Players can unlock new CGs by improving the favorability of the heroine by conquering her.
After three days of staying up late, Alvin finally unlocked all the CGs successfully and raised the favorability of all the heroines to the maximum.
The bad news is: the favorability level is overflowing.
But fortunately, it’s just a game, so it doesn’t matter even if it overflows… I originally thought so, but——
Alvin never expected that he would travel to the game world by chance, and meet a group of Type-Moon heroines such as Altria, Morgan Le Fay, Tiamat, Scathach, and Aika Satsuki...
When Alvin noticed those extremely gentle yet dangerous eyes, his eyes gradually lost their luster and he regretted his decision.
"So... why did I increase my favorability to the point of overflowing?"