The protagonist, , is a fairly ordinary university student. However, he has one very specific "complex": he has absolutely no interest in young women or girls his own age. Instead, he is exclusively attracted to older women, particularly "Mamas" (mothers).
If you are specifically looking for the PSP (PlayStation Portable) version, it likely does not exist. Many users confuse Gobaku with Wagamama Capriccio (another Selen game) which did have a PSP port titled Wagamama Capriccio Portable . If you enjoyed the style of Gobaku , that game is the closest equivalent on the PSP platform. gobaku moe mama tsurezure portable